Moray eel
Most underwater photographers get tired of photographing anemonefishes (commonly called clownfish, although only one species actually has the name "clown anemonefish"). I, on the other hand, can't pass an anemone with "clowns" living in it without stopping to annoy (take photos of) them. Call me a "Nemoholic!"
Nemo in Brown Velvet - false clown anemonefish in anemone