| Thuridilla gracilis | |
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| Species: | T. gracilis |
| Binomial name | |
| Thuridilla gracilis (Risbec, 1928) | |
Thuridilla gracilis is a species of sea slug, a sacoglossan, a marine gastropod mollusk in the family Plakobranchidae. It is an Indo-Pacific species that lives in or near coral reefs and eats algae.
This species occurs in the Tropical Indo/West-Pacific. It lives on the external slope of coral reefs, on top of the reef and in the lagoon, usually in shallow water.
This species can be up to 25 mm in size. The body is partially covered by the fold of the lateral parapodia. The mantle is black and crossed by multiple fine white longitudinal lines (eight to ten) punctuated sometimes with blue spots. The border of the lapel of the parapodia and rhinophores is often orange. The smooth rhinophores can be whitish without any lines.
This species is benthic and diurnal. Because of its aposematic coloration, it crawls around to feed in the daylight. It has a diet based on algae.
Nembrotha lineolata is a species of nudibranch, a sea slug, a marine gastropod mollusk in the family Polyceridae. It is found in shallow water in the Indo-Pacific. It was first described in 1905 by the Danish malacologist Rudolph Bergh. The type locality is Selayar Island, Indonesia.
Chromodoris elisabethina is a species of very colourful sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.
Goniobranchus geminus, also known as the gem sea slug, is a species of very colourful sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.
Chromodoris lochi, common name Loch's chromodoris, is a species of colourful sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.
Nembrotha cristata is a species of colourful sea slug, a polycerid nudibranch, a marine gastropod mollusk in the family Polyceridae. This species of sea slug is black with green markings; adults are around 50 mm in length, and they live on rock or coral reefs in the tropical Indo-West Pacific Ocean.
Nembrotha chamberlaini is a species of colorful sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Polyceridae. It was first described in 1997.
Notodoris minor is a species of sea slug. It is a dorid nudibranch, a shell-less marine gastropod mollusc in the family Aegiridae.
Phyllidia babai is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Phyllidiidae.
Chromodoris boucheti is a species of colourful sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.
Chromodoris burni is a species of colourful sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.
Goniobranchus fidelis, also commonly known as the faithful sea slug, is a species of colourful sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.
Ardeadoris averni is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Chromodorididae. It was transferred to the genus Ardeadoris on the basis of DNA evidence.
Hypselodoris insulana is a species of sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.
Hypselodoris jacksoni is a species of colourful sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.
Ardeadoris angustolutea is a species of colourful sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Chromodorididae. It was transferred to the genus Ardeadoris on the basis of DNA evidence.
Elysia diomedea is a species of sea slug, a marine gastropod mollusc in the family Plakobranchidae.
Thuridilla lineolata is a species of sea slug, a sacoglossan, a marine gastropod mollusk in the family Plakobranchidae. It is an Indo-Pacific species that lives in or near coral reefs and eats algae.
Phyllidia coelestis is a species of sea slug, a sacoglossan, a shell-less marine gastropod mollusc in the family Phyllidiidae.
Notodoris gardineri is a sea slug, which is a species of nudibranch, a shell-less marine gastropod mollusc in the family Aegiridae.
Cabangus noahi is a species of sea slug, a dendronotid nudibranch, a shell-less marine gastropod mollusc in the family Dendronotidae.