Common name: Green Brittle Star

General information

The Green Brittle Star, Ophiarachna affinis, is a striking and active member of the Ophiuroidea class, known for its long, slender arms and vibrant green coloration. This species is nocturnal and tends to hide during the day under rocks or within crevices. It is a scavenger by nature, helping to keep the aquarium clean by consuming detritus, uneaten food, and dead or dying organisms.

Care

Ophiarachna affinis requires a well-established aquarium with plenty of live rock and hiding places to mimic its natural habitat. It is sensitive to changes in water quality, so stable conditions and regular maintenance are crucial. This brittle star is an opportunistic feeder and will accept a variety of meaty foods, but care should be taken not to overfeed as this can lead to poor water quality.

Reproduction

Reproduction in the Green Brittle Star typically involves the release of gametes into the water column, where external fertilization occurs. In the aquarium, breeding is rare, but with optimal conditions, it is possible to observe spawning events.

Symbiosis

While not known for any specific symbiotic relationships, brittle stars in general play a role in the ecosystem by providing cleaning services and aeration of the substrate through their movements.

Habitat

Ophiarachna affinis is found in the Indo-Pacific region, from shallow reef flats to deeper waters. It prefers areas with plenty of crevices and overhangs where it can hide during the day and emerge at night to feed.