Cuttlefish can change color to fade into the background. It can do it amazingly fast.
more importantly they’re walkin on little peets
This is a Flamboyant Cuttlefish, which does not need to blend in, because it’s poisonous! The colors advertise that. They also don’t swim often because they aren’t very buoyant, which they can get away with, because again, poisonous.
Also they’re tiny.