Sponges - Phylum Porifera
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Sponge ID needed
Morphologically most closely resembles Neopetrosia sp.
Tom Turner tentatively IDs this as Neopetrosia problematica
A member of Demosponges Class Demospongiae
"I could be mistaken, but I think this is likely. I have found several sponges with this form in the Santa Barbara channel, and all have turned out to be this species. You didn't poke it by any chance, did you? This species is quite hard. "
Christmas Tree Reef, Palos Verdes, California
