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2026 · Photo: Boaz Liebes
Compound wart slug
Philippines · Indo Pacific - South China Sea
A large phyllidiid nudibranch named for the deep black fissures that split the tops of its tubercles. Like other phyllidiids it feeds on sponges.
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Black back almost covered by many tall, pale pink tubercles, so the black shows only as meandering lines between them. Tubercles have broad bases and mushroom-like tops made of small compound tubercles separated by black-lined fissures. A tall, translucent pink conical anal papilla stands above the tubercles. Rhinophores pink with black tips and stripes; foot pink.
Phyllidiopsis krempfi is predominantly pink with irregular black lines and no tall anal papilla; P. pipeki is brighter pink with two straight black longitudinal lines and rounded white tubercles.
Coral reefs; recorded at about 9–15 m.
Like other phyllidiids, feeds on sponges.