The hairy frogfish is a type of fish that's covered in spines.

In case you would be asking why, here’s is what we know: As many of the other critters I’ve written about, the main goal seems to be camouflage. This species seems to become hairy in areas with high filamentous algae growth, the hair mimics the algae and breaks up their body outline. However, Hairy Frogfish are not always hairy, they are relatively frequently seen without hair, but in that case they don’t always get recognised as “Hairy Frogfish”. As a matter of fact, their scientific name (Antennarius striatus) relates to the fact that they have stripes on their sides.