ore a ▁National ▁University ▁of ▁Arts ▁al umn i ▁Category : 2 0 th - century ▁South ▁Korean ▁women ▁writers <0x0A> </s> ▁H imer omet ra ▁robust ip in na ▁is ▁a ▁species ▁of ▁cr ino id ▁belonging ▁to ▁the ▁family ▁H imer omet r idae . ▁ ▁Description ▁H imer omet ra ▁robust ip in na ▁can ▁reach ▁a ▁diameter ▁of ▁about ▁. ▁It ▁has ▁a ▁cup - sh aped ▁body ▁with ▁ 3 3 - 6 2 ▁arms ▁( us ually ▁~ 4 5 ) ▁about ▁ ▁long , ▁extended ▁out ▁from ▁the ▁central ▁disc . ▁M outh ▁and ▁an us ▁are ▁both ▁on ▁the ▁upper ▁side ▁of ▁the ▁body . ▁Usually ▁this ▁species ▁has ▁re dd ish ▁or ▁mar oon ▁arms , ▁but ▁it ▁may ▁have ▁yellow ▁or ▁pale ▁brown ▁bra ch ial s ▁with ▁mar oon ▁p inn ules . ▁It ▁fe eds ▁on ▁det rit us , ▁ph y top l ank ton ▁and ▁zo op l ank ton ▁caught ▁by ▁means ▁of ▁a ▁stick y ▁subst ance ▁on ▁the ▁arms . ▁It ▁can ▁cl ing ▁onto ▁cor als ▁with ▁short ▁append ages ▁called ▁cir ri , ▁but ▁it ▁also ▁can ▁freely ▁sw im . ▁The ▁lar va e ▁of ▁this ▁fe ather ▁star ▁sw im ▁freely ▁with ▁pl ank ton ▁for ▁a ▁few ▁weeks , ▁then ▁they ▁sett le ▁down ▁growing ▁into ▁a ▁st alk ed ▁form . ▁M ature ▁spec imen ▁break ▁the ▁st alk ▁becoming ▁free - l iving . ▁ ▁Distribution ▁This ▁species ▁is