A filter feeder is an animal that that cleans out the bottom of the ocean or fishboll. A kind of fish is a filter feeder. NO - you're thinking of a scavenger - A filter feeder eats plankton and other small particles in the sea. They pull water through their body, straining it for food - push the water back out and eat any solids found.
The classification of a Sea Urchin is Echinoidea
Filter feeder get their food by straining (filtering) it from water, most often sea water. Examples of filter feeders are: sponges, clams, oysters, barnacles, basking sharks, whale sharks...
sea urchin
A sea urchin does move, but not very frequently.
because the crab needs the sea urchin for protection and the sea urchin needs the crab for food
Ummm...it's the thing from which a sea urchin hatches?
I think a sea anenome and a sea urchin can live together because i have a little aquarium and there is a sea urchin and and a sea anenome (if that's how you spell it) living in there and they were perfectly fine. BUT if you have a sea urchin do not have any crabs in there, because my sea urchin killed one, and almost killed another one by taking its claw off. :(
A lancelet is a filter feeder with no brain, eyes, or heart. A sea squirt is an example of a lancelet.
Spines of the sea urchin can cause injuries of the skin.
It urges the sea to adapt to IT! The litle urchin urger.
a blue tuxedo sea urchin