ID please

KennyKen · #1 02-10-2009, 02:18 AM

My friend just got back from maui, and said these were all over the rocks on the east shore.

Any ideas...
Looks like some sort of anemone.

Keri · #2 02-10-2009, 02:20 AM

Weird!! Is it hard or squishy?

KennyKen · #3 02-10-2009, 02:22 AM

squishy apparently.

Kabong · #4 02-10-2009, 05:43 AM

Sheild Urchin (Colobocentrotus atratus)

justinl · #5 02-10-2009, 07:28 AM

cool animal! when i first saw, it i thought i saw six equal radial segments, so i disregarded the possibility that it was an echinoderm (who have pentaradial symmetry). but that definitely is a shield urchin (according to google) so maybe the pentaradial symmetry is internal.