Arc-Eye Hawkfish Breeding Guide
Why the Arc-Eye Hawkfish (Paracirrhites arcatus) is not bred at home: protogynous sex change, harem structure and pelagic spawning with tiny buoyant eggs and planktonic larvae.
Overview
Paracirrhites arcatus is an Indo-Pacific hawkfish of the family Cirrhitidae. Like all hawkfish it lacks a swim bladder and perches on coral heads. Hawkfish are protogynous hermaphrodites and pelagic spawners, a reproductive mode that places the Arc-Eye Hawkfish outside the reach of home breeding.
Sex Change & Pairing
Hawkfish are protogynous hermaphrodites: individuals begin as females and some later transition to males, so a functional female will change into a male if the dominant male dies. Males are territorial and typically guard harems of a single male and several females, a social structure that complicates pairing in a tank.
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 a home aquarium cannot provide, so the Arc-Eye Hawkfish is not bred by home aquarists.