It's on a page with sea bunnies (a type of sea slug) but I think this one is a pikachu! -- BoredPanda
Adorable "Sea Bunny" slug.!
Jorunna parva, une limace de mer qui ressemble étrangement à un lapin
Sea Bunnies Exist, and You're Going to Fall in Love with Them
Cute! The Jorunna parva is a species of slug (pictured) dubbed ‘sea bunny’ because of its resemblance to baby rabbits. Footage captured the 2cm-long, fluffy-looking underwater creatures off the coast of Japan
This little sea slug closely resembles a bunny, and will cure any slug-phobia you might have.
Sea Bunnies: Japan Is Going Crazy About These Furry Sea Slugs | Bored Panda