cling fish, under an intertidal rock. perhaps T. pinnulatus?
This Gobiesox maeandricus (Northern Clingfish) was under a rock, and very cute!
Two individuals observed hiding under rocks at a low tide.
This Northern Clingfish had locked itself between the arms of an Ochre Starfish (Pisaster ochraceus). They use their pelvic fins to create a strong suction action that holds them fast to rocks, even in rushing water.