Longnose Hawkfish Breeding Guide
Why the Longnose Hawkfish (Oxycirrhites typus) is not bred at home: monogamous pelagic pair-spawning, protogynous sex change and tiny planktonic eggs that drift with the current.
Overview
Oxycirrhites typus is a hawkfish of the family Cirrhitidae with an Indo-Pacific distribution from the Red Sea to Hawaii, reaching about 13 cm. It lacks a swim bladder and perches on gorgonians and black corals. Hawkfish are pelagic spawners and protogynous hermaphrodites, which makes the species essentially unbred in home aquaria.
Sex Change & Pairing
Hawkfish are protogynous hermaphrodites: individuals begin as females, and some later change into males, so a dominant female can become male if the male is lost. Many hawkfish live in harems of one male and several females, but the Longnose Hawkfish is reported to form distinct monogamous pairs to breed.
Spawning Behavior
Hawkfish are pelagic spawners that release many tiny buoyant eggs which drift with ocean currents until hatching. The spawning pair ascends into the water column, and spawning occurs at night, at or near the surface, where the eggs are released and fertilized.
Why Home Breeding Is Not Feasible
The pelagic, ascending spawning behavior produces minute buoyant eggs and planktonic larvae adapted to dispersal in open water. Rearing such larvae requires plankton densities and water volumes that a home aquarium cannot provide, so the Longnose Hawkfish is not bred by home aquarists.