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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