Nice pic. Male fw sculpins defend breeding rocks. If a female is in the mood, she seeks out a male who had such a territory. If things work out, she lays her eggs on the underside of the rock and he fertilizes and defends them. In fact, female prefer to mate with males which have eggs already in their nests (some males eat the eggs - bad fathers). BUT, larger males will attempt to eat smaller fish, including females, who enter their territory. Thus, a female approaching a male is taking a risk, is this a date or dinnner? It is kind of a reversal of the male-female spider story. Obviously, this bigger fish did not heed Kliban's rule, "Never eat anything bigger than your head."