Blog

📌Support the Site

Apr 24, 2026 ♥1

Sea slug DNA identification: what COI, 16S, and H3 reveal

Jun 27, 2026

Hantazuia: three new sea slugs (including one named after me)

Jun 27, 2026

A new Pseudobornella from China — and rethinking what we call P. orientalis in Japan

Jun 26, 2026

Soft-sediment Fionidae get a major revision — and several Indo-Pacific "sp." finally get names

Jun 25, 2026

Kanoko-kisewata, previously treated as a variant of karasu-kisewata, is now a separate species

Jun 24, 2026

What do sea slugs eat? Sponges, hydroids — and chloroplast-stealers

Jun 23, 2026 ♥1

Most sea slugs are extreme dietary specialists, not generalists. From sponge-eating dorids and hydroid-eating aeolids...

Reconsidering Oxynoe jordani on seaslug.world

Jun 22, 2026

Komon-umiushi split into two species (Goniobranchus aureopurpureus + G. cf. variatus)

Jun 21, 2026

Gymnodoris nigricolor is a four-species complex: 65 years after Baba's 4 mm holotype

Jun 20, 2026 ♥2

Part of Thordisa moves to a new genus Avaldesia — and good luck telling them apart in photos

Jun 19, 2026

Okenia gets blown apart — Bermudella, Cargoa, Ceratodoris resurrected, Naisdoris erected

Jun 18, 2026

Kotohime-umiushi, globally treated as one species, is at least five

Jun 17, 2026

Polycera nimbsi — a Polycerinae paper adds three species and one new genus

Jun 16, 2026

Neville Coleman — The Australian Underwater Naturalist Whose Name Lives On in Three Nudibranchs

Jun 15, 2026

Neville Coleman OAM (1938–2012) was an Australian underwater naturalist whose name lives on in three nudibranchs in...

How to tell seguro-ryugu-umiushi and kurosuji-ryugu-umiushi apart

Jun 15, 2026

Kaloplocamus ramosus is at least two species — K. albopunctatus described, K. japonicus resurrected

Jun 14, 2026

The Spanish dancer (Hexabranchus) is now six species

Jun 13, 2026

Rambling notes on pineapple-umiushi (Halgerda willeyi) and friends

Jun 12, 2026

Hypselodoris cerisae vs H. krakatoa — what's the difference?

Jun 11, 2026