Starck's Damsel Breeding Guide
How the western Pacific Chrysiptera starcki pairs to spawn, with the male preparing a rubble nest and defending the eggs before a difficult pelagic larval stage.
Overview
Chrysiptera starcki, Starck's damsel, is a western Pacific species reported from the Ryukyu Islands and Taiwan to Australia, New Caledonia and Tonga, living around reefs up to 60 m deep and reaching about 7 cm. It is relatively peaceful for a damsel and reef-safe. It pairs up to breed: the male prepares a rubble-filled territory for the female to lay her eggs and then aggressively defends them.
Sexing
Damselfishes show little reliable external sexual dimorphism, and Chrysiptera and Dascyllus are not protandrous hermaphrodites in the clownfish sense. C. starcki shows no reliable external sex difference and is reported to fight when two are kept together, so a working pair is recognised by their joint defence of a nest territory. In practice a compatible male/female pair is identified by behaviour once a hierarchy forms, with the dominant male defending a nest site.
Conditioning
Damsels are hardy omnivores; conditioning relies on varied feeding (frozen and prepared marine foods plus some algae) and stable reef water. Because most species are aggressive, a breeding pair is best given its own territory with ample rockwork so the male can establish and defend a nest site without constant conflict.
Breeding Setup
- Compatible established pair given its own territory
- Temperature 24-26 C, pH 8.1-8.4, stable salinity
- Hard substrate (rock, rubble or shell) for the demersal egg patch
- Plenty of rockwork and hiding places to defuse aggression
Spawning Behavior & Trigger
When ready to breed the male swims back and forth swiftly, flashing his colours to attract a female. He prepares a territory full of rubble where the female lays her adhesive demersal eggs, which attach to the hard surface. The male then guards the clutch and aggressively defends the nest site.
Egg & Fry Care
The male performs the parental care, guarding the nest and aerating the eggs until they hatch. Across the family Pomacentridae the eggs hatch after about two to seven days depending on species and temperature. Newly hatched larvae measure roughly 2-4 mm and enter a pelagic stage that, depending on species, can last from about a week to more than a month before the young settle and take on juvenile colours.
Common Challenges
As with all damsels, rearing the pelagic larvae is the principal hurdle and requires a dedicated larval system. A secondary issue is intraspecific aggression: two C. starcki kept together tend to fight, so pairing should be managed carefully in a tank with abundant cover. As the fish grows it may also harass smaller, passive tankmates.