The seep urchip split from its ancestor. It has moved deeper and out to sea as while on Misc. animals some of them fell of and landed here in the cold seep. They all changed their diet to the Blarg pyamus as it is a new edible thing for them. Their beak-thingy has curved down and stabs into the Blarg pyamus and slowly sucks out the goo. They have not grown at all and are easily picked of by animals larger than them. It's shell has become one single piece to make it harder for anything to even try to eat it.
Picture by Neoskel.