This is a male striped poison-fang blenny mimic (Petroscirtes breviceps) watching over multiple batches of eggs that are at different stages of development. The eggs are adhered to the inside of the bivalve shell, with the eyes of many of the developing fish larvae visible. This male will have mated with several different females at various times, with each female depositing eggs to the inner surface of the shell. The male guards the eggs until they hatch. Pictured here, the male has just opened his mouth for a split-second.
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