Scuba dive off Point Loma, November 25, 2012
click on the thumbnail image to see the original larger image

gopher rockfishSebastes carnatus , with spines on its gill cover and head

Giant keyhole limpet shell and mantle

kelp rockfish Sebastes atrovirens, with spines on gill cover and head

sea slug Cadlina luteomarginata

top of a leather seastar, with its filtering madreporite at lower right, ... an intake sieve for its seawater-filled vascular system, used to power the seastar, provide oxygen, etc.

sea slug Flabellina iodinea