Thats a bristle worm trying to get away from something.
They will spiral themselves so the flow will pick them up and carry them somewhere else.Its one of their defenses against predators.Of course it also helps them get to where more food might be too.
Thats a bristle worm trying to get away from something.
They will spiral themselves so the flow will pick them up and carry them somewhere else.Its one of their defenses against predators.Of course it also helps them get to where more food might be too.