Pikachu Nudibranch Sea Slug
Nhobgood Nick Hobgood / Wikipedia, Pikachu, Tiny Fox Lab

Thecacera pacifica is a species of sea slug, a nudibranch, a marine gastropod mollusk in the family Polyceridae. It is sometimes also nicknamed Pikachu nudibranch due to its resemblance to the Pokémon character Pikachu.Tiny Fox Lab Facts

Preview photo credit: Nhobgood Nick Hobgood / Wikipedia, Pikachu
Source: https://en.wikipedia.org/wiki/Thecacera_pacifica