金桨鳍丽鱼

Overview

Open-water spawning sets Copadichromis chrysonotus apart: females collect eggs immediately and brood them in the mouth. It is uncommon in trade, and fish carrying its name are sometimes a different species, making identification important before recording breeding results.

Distribution & habitat

A Lake Malawi endemic, it has been collected between Karonga and Monkey Bay. It occupies relatively deep open water.

Aquarium setup

Provide a large unobstructed swimming area above sand, with limited rock piles for shelter. Avoid filling the water column with hardscape. Hard-water-tolerant plants may be included because the fish normally leaves them unharmed.

Diet & feeding

The genus specializes in zooplankton. Small live, frozen, and prepared foods are generally accepted, with Artemia nauplii a useful option. Some blanched vegetable food or spirulina flakes can supplement the captive menu.

Behaviour & compatibility

Its generally peaceful nature is poorly matched to boisterous fishes or aggressive Mbuna. Similar coloration can provoke attacks, while other congeners pose a hybridization risk. One male with at least three females suits many setups. Multiple males need substantially more space and a larger female group.

Sexual dimorphism

Males are larger, more colorful, and longer-finned. Their noticeably pale upper surface helps distinguish them from a commonly confused uniformly blue relative. Females are much harder to separate by appearance.

Breeding

A male defends a three-dimensional area of open water from rivals while allowing females and other species through. A receptive female follows his display into its center. Eggs are released in midwater and caught in her mouth, with the male's anal-fin egg spots involved in fertilization. A species group offers better opportunities to raise young.

The female broods for three to four weeks without feeding. Her enlarged mouth and chewing-like adjustments reveal the brood. Disturbance risks premature release or loss, so an unharassed female is best left in place. Long isolation can also complicate her return to the group. Artificial stripping is not necessary for a beginner. Naturally released young take Artemia nauplii and crushed dry food; they can usually remain with adults without harm, though observation is still appropriate.

Notes

Do not substitute the sand-nest or rock-surface spawning arrangements of related species for this fish's open-water requirements. Check the male's dorsal coloration and complete scientific identity when buying.