This East Pacific red octopus was found by our guide in the intertidal zone of the San Ignacio Lagoon, and of course returned to reside under his rock.
Night tidepooling at FMR = octopus central!
Fitzgerald marine reserve
That's a big octopus. I had the good fortune to watch this guy emerge from its refuge and slink across the pool. As I was watching its tentacles disappear, I heard a thrashing from the next pool over. I hopped up to check it out and saw the octopus was killing a pretty sizable fish. I thought I was recording video of the whole things and felt pretty awesome about it, but then realized I had forgotten to hit record. Le sigh.
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.