Labeos

One look at the labeos' shape reveals that they are bottom-dwellers in fast- flowing water: quite streamlined to minimize current drag, with a flat belly for resting on the bed and barbels for sensing prey on or in the substrate. These fish are primarily "twilight" (nocturnal) species; they are also aggressive toward con-specifics in defense of their territory, though coexisting peacefully with other species. As is the case with other aquarium fish, it has become possible to breed the labeo borrowing techniques recently developed by scientists for propagating marine species. This involves the use of hormones, and is a method unavailable to the amateur breeder.

What happens is that the hypophysis - a small gland located at the base of the brain - is removed from carps or related species and crushed in a slightly saline solution. A minute quantity of this solution - containing the diluted hormone - is injected into the chosen fish; if she is "ripe," she will start to lay within 24 hours, producing hundreds of eggs.

Labeo frenatus •

Albino variety. Size: 10-15 cm.

Labeo frenatus •

Albino variety. Size: 10-15 cm.

Labeofrenatus

The red-finned shark or rainbow shark is distinguished from Labeo bicolor by a less intense body coloration and by its red fins. Sometimes a commercial albino variety is found, which can be mated with the normal variety; the fry will then display the coloration of one or other of the parents. Size: 10-15 cm.

Labeofrenatus

The red-finned shark or rainbow shark is distinguished from Labeo bicolor by a less intense body coloration and by its red fins. Sometimes a commercial albino variety is found, which can be mated with the normal variety; the fry will then display the coloration of one or other of the parents. Size: 10-15 cm.

Labeobicolor

The red-tailed black shark, rather nocturnal in its habits, obtains its food by sifting the bed of its natural habitat. In captivity, it needs extra vegetable material. By day it lurks in various hiding places (rocks, roots, etc.) which form an essential part of the aquarium furnishings. Size: 10-15 cm.

Labeobicolor

The red-tailed black shark, rather nocturnal in its habits, obtains its food by sifting the bed of its natural habitat. In captivity, it needs extra vegetable material. By day it lurks in various hiding places (rocks, roots, etc.) which form an essential part of the aquarium furnishings. Size: 10-15 cm.

Goldfish varieties (Carp family)

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