Most likely a juvenile Bigfin Reef Squid, Sepiotheuthis lessoniana, as that is the only squid regularly seen in the area. This was a tiny juvenile, less than 1 inch long, caught in a crinoid.
Wonderful scene of predation under very low water level!
Southern Shortfin Squid; Broadtail Shortfin Squid.
Taken via Otter Trawl in several hundred feet of water.
Looked like 2 were mating
3" long. Tide pooling group excursion. Low tide. Shell Beach, Sonoma county.
Found in a tide pool
A cephalopod is any member of the molluscan class Cephalopoda (Greek plural κεφαλόποδα (kephalópoda); "head-feet"). These exclusively marine animals are characterized by bilateral body symmetry, a prominent head, and a set of arms or tentacles (muscular hydrostats) modified from the primitive molluscan foot. Fishermen sometimes call them inkfish, referring to their common ability to squirt ink. The study of cephalopods is a branch of malacology known as teuthology.