Pure white with a bold red band along the highly ruffled margin, rhinophores and gill the same red color. Relatively deep water 20-30 m.

Grey with pinkish hue and two longitudinal black lines, some specimens with a few black spots or several black rays extending to the edge of the mantle, tubercles large, single or compound, rhionophores black and pink with a black line posteriorly.On the reef flats in 10-20 m. Body size up to 8 cm.

Almost entirely transparent with opaque threads that are visible through the body wall. Size 50mm. Found in 7 - 18 meters on xenia soft coral.

Bright yellow with black mottling rather than distinct lines as in Aegires minor.On the yellow sponges Leucetta primigenia and Pericharax heterographis on reef crests and slopes at 10-20 m

Cream with brown spots and blotches; rhinophores and gills dark brown; tubercles pointed, low, scattered between creases in the brown blotches. Found on shallow reefs, feed on colonial tunicates from Oxycorynia genus.

Black with orange ridges and white apical crest; rhinophores red. On exposed walls in moderately deep water, 14-65 m.

White with a thick orange marginal band; have a series of burgundy to purple markings on the body; rhinophores and gill dark orange. Live on shallow reef where it feeds on sponges.

Blue with black pigment between the ridges; tubercles and rhinophores yellow; a black line on the foot sole. Most common and widespread species in the Indo-Pacific area. Can be found on coral reef area. Body size up to 11 cm.

Cream with blood red spots and broad white and yellow marginal bands. On reef fronts and drop-offs in water from 1-30 m.

White with opaque white spots and a prominent longitudinal mid-dorsal ridge covered with large tubercles; ridge encircled by a black ring with radiating black lines; mantle margin with smaller tubercles; rhinopores pale pink. Can be found on reef area 10-30 m.

White with brown and purple pigment on the back; appendages slender. Usually found on the underside of the sponge where it feeds on bryozoans in 5-15 m. Body size up to 25 mm.

Purple with a thin marginal white line, three longitudinal lines on the dorsum, which can be yellow, with a white edge on each side, in some specimens the lines are broken or only the medial line is present.Feeds on the sponge, Dysidea sp. in which the animals may entirely embed themselves. On shallow reefs to 30m

Translucent yellowish, speckled with black and white spots; oral veil margin yellow; oral tentacles black; three pairs of short lateral appendages, the last two pairs having prominent white globular structures. Body size up to 6 cm.

Translucent white with large opaque white blotchs over the dorsal surface, yellow marginal band, gill white, tipped in red, rhinophores also white with yellow apices.

Pink to lavender with an orange submarginal band; tall tubercles on the dorsal surface with reddish-purple pigment. Generally on shallow sandy area where it feeds on the sponge. Body size up to 3 cm.

Translucent white with opaque white covering most of the body. Cerata is orange with black tips. Feeds on the eggs of Hexabranchus sanguinensis, Goniodoris felis and Hypselodoris spp.

Black with complex pattern of brick red patches and white dots, oral tentacles brown with red flecks, extrarhinophoral and extrabranchial appendages white with pale pink apices, rhinophores with white stalks and blotchy black clubs. Found on rubble slopes.

Orange with purple to black markings; extrarhinophoral processes fimbriate. rhinophores witrh black tips and a different arrangement on the spots. found in 7 - 18 meters depth on rubble and sandy.

Uniformly maroon, or with opaque white irregular markings variable in size; rhinophores white tipped; large extrarhinophoral and extrabranchial appendages. found in 4 - 12 meters on rubble and sandy.

Orange-brown with a series of medial opaque pale blue diamond-shaped markings; cerata orange-brown blood-red rings. found in 2 - 30 meters on coral and rubble.

Yellow to orange brown with scattered black spots, each ringed with a diffuse with band; mantle margin highly ruffled. found in 5 - 20 meters in rubble.

Cream to orange with large black spots, and black markings on the large extrabranchial processes, extrarhinophoral processes fimbriate.On arborescent bryozoans on shallow reefs.

Black with yellow lines. Gill branches highly pinnate. On reefs in 3-20 m; it has been observed feeding on Nembrotha kubaryana, Tambja verconis and T. morosa

Brown or orange with a series of black-tipped caryophyllidia; mantle glands opaque white along the edges of the mantle; rhinophores and gill black. found in 5 - 20 meters depth on coral, rubble and sandy.

Color variable from white to black with prominent dorsal longitudinal ridges, which may have orange pigment on them; margins on the mantle and oral veil orange; rhinophores black with orange apices. On reefs in 1-40 m. Body size up to 1 cm.

Creamy-white with large brown and white fleshy tubercles and bright blue spot in depressions between tubercles. On shallow reefs in the open or under rocks. Body size up to 6 cm

Brown with numerous opaque white pigment and a network of grey ridges surrounding dark brown pits,rhinophores and gill grey with abundant opaque white pigment. Found under coral rubble.

Translucent white with fine brown reticulating lines over the surface of the body; cerata with pointed tubercles over their surface; digestive gland within each ceras highly branched. found in 8 - 30 meters depth on xeniid soft coral.

Translucent whitish with an opaque white and yellow diamond on the head just behind the brown, perfoliate rhinophores, cerata usually pink to red with opaque white spots, each with a dark bluish spot below the apex. Feeds on egg masses of opistobranchs,especially Hexabranchus sanguineus.

Light pink to purple with darker purple and orange spots and tubercles. Found on shallow reef and coral rubble where it feeds on sponges.

Grey, darker brown areas on either side of the bases of the secondary gills, the produces a symmetrical and striking color pattern, opaque whiteb spots near the central portion of the notum, velar tentacles with bifid or trifid apices, notum with a complex reticulate pattern of low tubercles. Found on sand or rubble. Depth from 5 - 20 meters. Mimics and feeds on soft corals from the xenia family.

Beige with black logitudinal lines; extrarhinophoral processes fimbriate, outlined in black; rhinophores and gill with black pigment. Found in 7 - 18 meters depth on rubble and sandy.

White with orange pigment only in the center of the dorsum, not covering the margins of the notum; papillae elongate and pointed with red pigment on the apices. Body size up to 9 mm.

A moderately large aeolid nudibranch in which the cerata are arranged in about eight fan-like clusters on each side of the body. The cerata are cylindrical, tapering at the tip to a rounded point. The general body colouration is pale lilac purple. The oral tentacles and the upper half of the slender smooth rhinophores are a reddish purple. The cerata are similar in colour to the body except for a bright golden yellow tip and a band just below the yellow tip which ranges from deep reddish purple to deep purple. Many of the smaller outer cerata in each row are golden yellow with nno purplish basal region. It grows to 35mm in length. It is usually found associated with its food, an orange hydroid, Sertularella quadridens.

White with a series of longitudinal red-brown lines on the notum, Blue spot along the notal margin, brown pigment may be present on the notum together with opaque white pigment on the elevated tubercles. On sandy and rubble slope in 10-25 mtrs

The base color of the body is white with a brown pattern which is broken by large purple or purple-brown circles. These marginal bands of purple over white can sometimes be confused with Risbecia tryoni. Their body length is up to 60 mm.

This nudibranch has a wider body with rounded lobes around the edges and round depressions near the middle. The dorsal tubercles are compound and they have color variations from green to brown or red to brown, with cream colored pustules and blue spotted ringed with red. They are usually found in shallow water or hiding near rocks where they are well camouflaged. Their body length is up to 75 mm.

This species has a dark base color with large yellow or orange spots and marginal bands. The rhinopores are black with an orange apex. Light green pigment is present on the gill branches. It has a body length of about 65 mm.

This species have a reticulated patterns of white lines on mantle and foot, also orange to red margin on mantle rhinophores and gills yellow to orange . Have white mid-line on the mantle.

Have black base color with pink tubercles arranged in small cluster. This species is very common and can be found at shallow water or also can be found at rubble area.

This species has a blue mantle with a dark outline and lacks a mid-dorsal longitudinal line. It also has small black specks within the blue areas. They are usually found on rocks, walls and reefs, and they feed on sponges. They are found in a depth range of around 15-30 m. Their body length is about 40mm.

Solitary, found on reef where it feeds on ascidians. Conspicuous nudibranch species characterised by small pustules covering its body, which are connected into longitudinal lines in some variations. Colour and pattern of the pustules can vary. The most common colouring has a black body base and green pustules and rhinophores, with orange gills and edge of foot. The size is about 80mm.

This special nudibranch was named by Dave Behrens (famous Marine Biologist). It has a pale bluish base color with longitudinal black stripes and distinct black spots between the yellow rhinophores. Has a white margin at the mantle and yellow tips on the gills. The size is up to 40 mm.

Has a white dorsum covered to near edge with a fine pattern of red reticulations, has a white edge on the mantle, gills whitish to pinkish, rhinophores dusky brownish, foot with pale bluish edge. Body size is about 80mm.

This nudibranch has a bizarre shape. It has a high branchial pocket where the gills stand erect. It has a white base color and black to brown lines on the body. The gills and thick rhinophores are brown. This species is often found making a pink ribbon egg mass. The body size of length is up to 17 cm.

This species has a brown color with black and white lines on the body. It has a fairly flat appearance and a central hump in the middle back. It feeds on sponges and can be seen crawling in rubble or under rocks. Body size is up to 70 mm.

This species is variable and can reach a body length of about 200 mm. They have a brown color and large fleshy tubercles. They are found active crawling at night at rubble areas.

The largest species of nudibranch, they may be up to 600 mm in length. They have variable colors but are usually red, pink or orange. They have six separate gills and distinct pockets. They are usually found swimming through the water with undulating movements.

This flat species has a granular texture and a relatively stiff body. It has a gray blotched body with orange marginal rings and rhinophores. It is usually found crawling at night.

This species has a white body color and along the body it has orange or red spots and lines are present on the gills. This species is a voracious predator of other nudibranchs.

This nudibranch has an ugly look and their size can be up to 200 mm. They resemble a mass of algae. Their cerata is large and they have a round oral hood around their mouth. This nudibranch feeds on crustaceans and most of them are capable of swimming by moving their body from side to side.

It has a white base color and black rings and gills. The rhinophores are a distinctive black color. The body has a fuzzy appearence, and the compound papillae are called caryophyllidia. Their body size can be up to 100mm.

Yellow is the base color of this nudibranch’s body and is has black circles that are surrounded by white and yellow tubercles. The rhinophores are an orange color. It is has a variable color pattern. This species is very common.

This nudibranch is very common. It has black base color. Single, isolated tubercles are surrounded by a black reticulated area, it had gold rhinophores, and its size can be up to 45 mm. They are usually found in shallow water reef from 5-10 m.

This species has a reddish brown dorsum with many low tubercles and a gill tree like a thick trunk. It also has a crown of large branches, rhinophoral sheaths with a spreading rim, and a flower-like oral veil spreading with many finger-like appendages along the front.

White to pink with white lines and purple edge on mantle and foot rhinophores and gills yellow to orange. May comprise several species

This species is whitish brown with thin lines on their mantle and blue spots mix with yellow color at the tips of the mantle. Their rhinophores are a bluish color with black lines. Their body size is up to 25 mm.

Their mantle is narrow compared to their grey-brown foot that has a white margin. Their mantle is pale brown with white lines. Their rhinophores are brown on pale stalks.

This species is bluish-white to pinkish with blue-purple pustules on the dorsum edge of the mantle. It has a series of yellow to orange blotches. It’s foot has a blue edge.

Grey or pinkish with a white midline. The base can also be blue, tan and yellow with white-tipped oral tentacles and similar colour over its length. Rhinophores are mostly pinkish with white or yellow and have a long and hairy tail. Their body size is about 50 mm and they usually live on hydroids.

This species has a black body with blue lines and spots in many variations on the body and the tips of the gills. The size can be up to 7 cm.

This species is recognize by its triangular orange ridges with brown pigment and orange markings. It also has white spots. The gills and rhinophores are white with black tips. Found in shallow water or rubble.

This colorful species has a white base color with black stripes from mid line in front of the gills and a blue foot. The gills and rhinophores are orange to red with a blue accent. The length is up to 50 mm.

This species is black with green dots along the body, largely green gills and black rhinophores. It has a green margin around the base of its foot. Its size can be up to 12 cm

This species is similar to Phyllidia ocellata and P. willani, but it has minute, scattered opaque white spots on the body, black rings at the base of some tubercles and a pale yellow marginal border. Like most species of phyllidilis it produces a pungent noxious chemical that is toxic to fish and crustacean predators. Length 65 mm

This nudibranch have variation base color and have pattern of mantle undulating deeply and usually irregular, have lobes of similar size along sides. Gills and rhinophores as dorsum color with fine white speckling. The size of length is up to 80 mm.

This species is large: up to 100mm in length. It is mostly found on sandy areas and feeds on soft coral like Sarcophyton. It has curly, fuzzy cerata and its color is purpleish with yellow blotches on the cerata.

This beautiful nudibranch is hard to recognize. The base body color is brown with thick cerata, the tips of which have a bluish color with brown dots. The size can be up to 20 mm.

Like with most aeloid nudibranchs, the cerata of this species is easily dropped when the animal is disturbed. This is a way for them to defend themselves similar to a gecko dropping its tail. The pale color is similar to a solar powered nudibranch but it has a smaller shape: only about 2.5 cm. Mostly found in sandy areas or rubble.

This species is a predator for soft coral especially Pachyclavularia violacea. Its body is a purple to gray color and has long cerata covered in fuzzy small hairs with white tips. It is very difficult to recognize as it looks so similar to its coral food source. Its size is around 10 -20 mm.

Body creamy white to yellow. Mantle with distinct blank line on its edge which highlights the strong undulation, especially in adult; rhinophores and gills as body color with black tips. Size up to 90 mm.

The central dorsal region of this nudibranch has tiny speckles of yellow to reddish brown on a white base, in such a density that it seems to be a uniform color. The edge of its mantle is usually yellow to orange with strong undulation. The body length is about 60 mm.

It has a rounder body than most nudibranchs with a yellow base color and mixed purple and blue markings on the mantle edge, also has black dorsal spots edged in blue and white. When it crawls its mantle has a beautiful undulating movement.

This beautiful nudibranch has an elaborate color pattern, with white and black undulating lines surrounding a central area with pink and orange color. The mantle has an undulating movement when it crawls. Mostly found on coral areas.

This species has a purple body with white tubercles and a network of black lines. Has green tipped rhinophores. Mostly found in shallow water or rubble areas.

Mostly white with white to pale yellow low pustules, with dusky shading around them; several black-edged white ocelli centrally but randomly placed between the rinophores and gills, black to purple on edge of mantle extending inward at regular intervals giving the impression of undulating. Gills and rhinophores pale reddish. Size up to 40 mm.

Pale blue with black, blue edged stripes and spots, usually has a short stripe with spot in front between rhinophores. Mantle with white margin gills and rhinophores peppered with small white spots. Size up to 40 mm

Mantle pale grayish blue, peppered with tiny white spots, large black spots and short to long black stripes; mantle margin white and usually with yellow blotches and a few black spots along edge, rhinophores and gills mostly yellow. This species is often confused with Chromodoris dianae and appears to be restricted to the Philippines.

Whitish blue-grey body with white border and black stripes edged with blue. Gills and rhinosphores purplish to pinkish white. Several similar undescribed species are confused under this name. Length 30mm

Bluish body with longitudinal dorsal black stripes, usually three in principal but many variations exist. Mantle has a yellow to red orange submarginal band. Rhinosphores and gills orange to red. Sometimes this species looks similar to Chromodoris annae but the latter lacks a centre stripe and has a finely speckled blue back. Length 40mm.

Bluish white body with variable longitudinal black and sometimes yellow stripes. Has a yellow orange submarginal band near gill edges and rhinosphores are yellow to bright orange. Appears to be highly variable or may involve some forms presently included in the name which could represent additional species. Length 55mm.

White base color and distinct orange edge on mantle. Foot area is white. Has large rhinophores with white lamellae and transparent gills. The length is up to 15 mm.

Similar to Cromodori annae, but lacks darker punctuations; blue body with a mid-dorsal longitudinal black line that may be broken into series of short lines and a bright orange mantle edge. Found mainly on rocks: wall, reef and rubble. Seen in association with folioes sponges that they source as food.

This species has a creamy to yellowish base color, and has purple lines or red lines along the mantle margin and foot. The gills and the rhinophores are red. The size of length is up to 45mm.

Has a yellow base color with blue to black lines and is haloed in purple. The edge of its foot is pale blue. Its gills and rhinophores are orange to red color with white tips. The size is up to 4 cm.

Blush grey with a combination of orange and yellow spots and some black to blue spots scattered among or mainly along edge of mantle and foot. Has blue rhinophores and red gills usually with a series of yellow spots along their branches. The body size is about 55 mm.

Highly variable coloration, usually with several thin white lines over its back with small dark spots scattered between, a series of dark blotches along the margin on its head and the end of its foot in a bluish setting. Its rhinophores are long and pale with 2 or 3 brown bands and its gills are relatively small and pale with brown or orange tips.

This species has a greenish and black color with black pigment on the rhinophores and gills. The body itself can be relatively smooth with longitudinal folds or with elevated pustules. It feeds on solitary tunicates like Sigillina signifera and Clavellina moluccensis. Found on shallow reefs from 3-10 m with a body length of 100mm.

The background colour is a rich pinkish purple with a white border to the mantle. At the edge of the mantle the border is solid white but inside this is a region of varying width in which the white forms a reticulate pattern gradually merging in to the pinkish purple. The rhinophore stalks and the base of the gills is an intense purple, the rhinophore clubs and the gills are orange yellow. The body length is about 100mm

They are yellow to bright orange with thick cerata which are variable in colour and have blue tipped pink to red tops. Their rhinophores are tall and slender with the same color as their cerata. Their body size is about 40 mm and they can usually be found at 10-20 m in sandy areas

They have a slender and long body up to about 15 cm. They have cerata in a fan-like cluster with a colour from white to brown to orange and sometimes blue depending on the food source and accumulated zooxanthellae. You can find them at sandy areas or on hydroids.

Translucent white with thin orange lines in a busy pattern of reticulation. and a species of orange to red spots bouncing along edge of mantle. Tubercles with orange to red tips outlined by white, often many as a series along ridges, gills and rhinophores with small dark brown spots. Length about 70 mm

White body with yellow nodules and geometric yellow and black markings, similar to gills. Yellow rhinophores. This distinctive member of the genus Halgerda differs from other members that have black and white gills and rhinophores. Body size is about 6 cm

Body size is about 15 cm. Base color is orange to yellow; broad mantle has 2 or 3 lobes which are outlined in white and have a series of blue or purple dots. A toxic elongated skin flap protecting the gills gives this nudi its characteristic ‘T’ shape. Emperor shrimps often hitch a ride on their broad mantles.

Translucent white with black lines and orange-red tips on appendages and other extremes on the body. Some variations have lines breaking up into spots. The body length can be up to 20mm but is usually 10-15mm.

The body has tall rhinophores that have pale cream to brownish grey sides of cerata with a series of finger-like papillae on both sides.

The name of this species refers to it’s eel like swimming motion. Has 3 pairs of leaflike cerata (dorsal protrusions) followed by 3 single cerata, feathery gills, distinct black eye spot; and mosaic pattern of dark lines filled with white, black, yellow or orange.

General habitats for this species are coral or rocky reefs. You can usually see them on hydroids, feeding, mating and laying eggs. Body colour can be very variable and range from white, pink, purple to orange. The sensory organs and the tips of the cerata are usually pale orange colour. It has the ability to reposition the stinging cells from its food source (hydroids) to the tips of its tentacles for protection.

Body mostly white, rhinophores smooth and very tall, oral tentacles smooth but much shorter. Found on sandy bottoms and coral reefs near soft coral Xenia sp, its sole food source. Its cerata perfectly mimic the shape and creamy colour of Xenia polyps. It can be very hard to find, because it looks like a small Xenia colony. It is one of the solar-powered species as it keeps some of the Xenia soft coral algae within its cerata. The algae photosynthesise and supply the nudibranch with sugars.

Found on sand, rubble and in mud. This species can be distinguished from other very similar looking species of genus Ceratosoma by the purple line rimming its mantle edge and purple spots dotting the bottom of its foot. As in all Ceratosoma species, gills are protected by a toxic skin flap, which give these nudibranches the typical ‘T’ shape. Emperor shrimps often hitch a ride on their broad mantle.

This striking nudibranch is found on coral and rocky reefs or sandy substrate, most of the time close to it’s only known food source to date, Sacrophyton soft coral. It has many flattened ceratas growing from the top of its mantle. The large surface areas of ceratas act as solar panels and allow extensive photosynthesis through the algal patches (symbiotic zooxanthellae ) obtained from its soft coral food source . It’s famous for it’s ability to obtain nutrients through photosynthesis. Probably toxic. Body size is about 14 cm.

This species can be found both in sandy and coral areas. They are often seen in pairs and can be observed tailing each other, which is a behaviour known best from this species. It is a distinctive nudibranch with a high-profile body with purple spots encircled in white patches dotting its cream coloured mantle. They can have several spots within the white areas at the edge of the mantle and foot. They have a thin blue line on the rhinophores and gills with yellow, pink or purplish toning. They are a common species, often seen head to tail crawling along in pairs across sand flats. Their body length is about 90 mm.

Found on sandy bottoms and coral reefs near soft coral Xenia sp, its sole food source. Its cerata perfectly mimic the shape and creamy colour of Xenia polyps. It can be very hard to find, because it looks like a small Xenia colony. It is one of the solar-powered species as it keeps some of the Xenia soft coral algae within its cerata. The algae photosynthesise and supply the nudibranch with sugars.

Lives on coral and rocky reef areas, where it feeds on calcareous sponges of genus Leucetta. It has the ability to import small spikes from its food source into its foot, which leads to its very rigid and hard body. This is quite a large species of nudibranch, bright yellow with variable amount of black patches. Can be sometimes seen laying a ribbon of bright yellow eggs.

Body color usually white/cream with dark brown to black saddle-like dorsal patches or lines. Blue margin along foot and mouth. Gills are red with blue or pink stripe and yellow base. Several species occur.

Found on sandy substrates, usually bellow 20 meters. Conspicuous species which can be recognised for its snow white body covered by orange spots and orange contoured gills and rhinophores. Predatory species, feeds on other nudibranchs including its own species.

Usually found on patch reefs and beneath coral rubble. Widespread nudibranch with differing regional color patterns. The Indonesian color variation has a brownish body dotted in white, with double yellow and blue rim around the outer edge of the mantle. Can be confused with a similar species, Glossodoris hikuerensis.

Usually found on patch reefs and beneath coral rubble. Perfectly camouflaged to fit its surroundings. Its mantle colour can be white-red or pink, cream-white or brown. The white mantle edge is rimmed by a grey- purple band. It has long gills with dusky streaks, its rhinosphores are similar to its body colour. Length 110 mm.

General habitats for this species are coral or rocky reefs. You can usually see them on hydroids, either feeding, mating or laying eggs. Body colour is highly variable and ranges from white, pink to purple with bright purple stripes on its cerata (the elongated respiratory organs growing from its upper body).

Body size is approximately 70mm. Purple body with yellow rhinophores and gills. Mostly lives on hydroids or in coral areas. Can be found at 10-20m depth in the day time.