Main image, Pikachu Nudibranch - Thecacera pacifica, by Rafi Amar
Thecacera pacifica is a species of Dorid nudibranch, It is also known as the Pikachu nudibranch!
Above, Photo by Connie Chen
It is found on the African coast of the Indian Ocean (Mozambique), Indonesia and Vanuatu. It has also been found on the Gulf of Mexico!
Above, Photo by Brian Mayes
They grow to around 2-3cm in length, and live underneath loose rock and sand!
A video of one wobbling around in the sea!
They also seem to have some variety in colour and patterning....!
Above, Photo by Francis Lau
Above, Photo by Ludovic
Info via wikipedia, and seaslugforum
edit- Once again I forgot to do the pop out image thing
