粗背鮰 · Playfair's Panchax

Overview

Native to forest streams of the granitic Seychelles, Pachypanchax playfairii has distinctive sex-related markings. Most adult males show raised scales along the back, while females have a black dorsal-fin eyespot. These normal features are useful for identification.

Distribution & habitat

Native island records include Mahé, Praslin, Silhouette, and La Digue, where the fish uses small streams beneath humid tropical forest. The Zanzibar population was translocated and should be distinguished from its original range.

Diet & feeding

Feeding is usually easy, with quality dry products accepted alongside live and frozen foods. Earthworms, bloodworms, tubificid worms, and daphnia are options. Wingless fruit flies and small crickets can also be offered after being well fed themselves.

Behaviour & compatibility

Generally peaceful, it may nevertheless prey on much smaller fish. A species group is a practical option when sufficient refuges are available. Males regularly challenge each other, although serious physical injuries are uncommon.

Sexual dimorphism

Males become larger, more colorful, and longer-finned, with reddish-brown flank spots. Most mature males also have raised dorsal scales. Females show the distinctive black spot in the dorsal fin.

Breeding

Under suitable conditions, eggs are readily laid among live plants, moss, or synthetic mops. A group can remain in a densely furnished tank, where some fry may escape adult predation. Alternatively, remove eggs or the spawning material for separate incubation. Survival among cover does not mean the adults leave all offspring unharmed.