Pustulose Wart Slug

This small, bumpy sea slug is one of the most common nudibranchs, or shell-less sea slugs, seen on Indo-Pacific reefs. It grows up to 6 cm long.

Also known as: pimpled phyllidellia

This species can look like other Phyllidiella and Phyllidia sea slugs. The clearest mark is the back: three separate clusters of bumps in a row, not one long ridge. Its black-tipped feelers confirm the match.

This sea slug has three clusters of small bumps, called tubercles, running down the middle of its back. They are usually pink, but can be pink, green, or white. In young animals these bumps run together in one line. In bigger adults they separate into clear groups. The edge of its mantle, the soft outer skin, is pale pink. The two feelers near its mouth are broad, triangular, and tipped in black.

It lives on reefs across the tropical Indo-West Pacific. It is found in both shallow water near the shore and deeper water, at depths of 6 to 38 m.

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  Black-margined Nudibranch

  Doriprismatica atromarginata

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  Blue dragon

  Glaucus atlanticus

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  Cratena Slug

  Cratena peregrina

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  Dotted Sea Slug

  Peltodoris atromaculata

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  Faithful Sea Slug

  Goniobranchus fidelis

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  Four-lined Polycera

  Polycera quadrilineata