Chaetodermis penicilligerus

Chaetodermis penicilligerus, commonly known as the Prickly leatherjacket, is a well-known medium-large filefish. Their body if anywhere from creme-white to green to brown, with (mostly horizontal) short an long thin brown wavy stripes. But the most notable feature of this fish are the small appendixes all over the body. Because these fish is mainly found betwee seaweed, these appendixes make a perfect camouflage.

Filefishes are usually bought because they eat aiptasia. Although this is often the case, some individuals refuse to eat this. On the other hand, it's known to pick on coral polyps and their tissue and this might be an important part of their diet in nature. So these fish are always a bit of a risk with corals. They are very friendly to other fish except their own genus though.