Tritonia hombergii has no common name despite being readily found around most of the UK. It is our biggest sea slug or nudibranch reaching 20cms. Colour varies from white to a yellowish brown and they feed almost exclusively on the polyps of soft corals, particularly dead man's fingers, Alcyonium digitatum. They are frequently seen laying an intestine-like egg coil containing many thousands of eggs. They should not be touched as they can discharge a mucous if disturbed which may cause blistering on the skin.

Tritonia hombergii has no common name despite being readily found around most of the UK. It is our biggest sea slug or nudibranch reaching 20cms. Colour varies from white to a yellowish brown and they feed almost exclusively on the polyps of soft corals, particularly dead man's fingers, Alcyonium digitatum. They are frequently seen laying an intestine-like egg coil containing many thousands of eggs. They should not be touched as they can discharge a mucous if disturbed which may cause blistering on the skin.