The yellow-head jawfish is a mouthbrooder. After fertilizing the eggs, the male jawfish collects the mass of eggs in his mouth….hundreds of ‘em….and carries them around until they hatch. While he’s patiently waiting for his kids to hatch, the father can’t feed himself. This, of course, is because his mouth is already occupied and he probably wouldn’t want to accidentally swallow his children! After the eggs hatch, the dad hits the buffet line for a while to try to gain some weight back!