Corynopoma Riisei

Datasheet

General Description

The Corynopoma Riisei, also known as the Swordtail Characin, is a unique tetra species within the Characidae family. It is characterized by an upturned mouth and keeled body shape, suggesting a diet primarily of small invertebrates from the water surface. The male specimens possess glandular tissues on the caudal peduncle, a paddle-shaped appendage on the operculum, and elongated fins, while females appear rounder in the belly compared to males.

Aquarium Setup

When setting up an aquarium for C. riisei, it is crucial to mimic its natural habitat. These fish thrive in well-planted tanks with floating vegetation, driftwood twigs, and scattered leaf litter. The tank should provide ample open space for swimming, as these surface-dwelling fish prefer pelagic environments. Water conditions should include a pH range of 6.0-7.0, hardness of 1-15°dH, and a temperature between 22-28°C. For specific details, refer to the provided water parameters table.

Behaviour

The Swordtail Characin is generally peaceful, but males may engage in occasional squabbles, emphasizing the importance of keeping them in groups of 6-8 individuals. They are compatible tankmates for various South American species like characins, Corydoras, Loricariid catfish, and dwarf cichlids. These fish can coexist with other peaceful species sharing similar tank conditions.

Feeding and Diet

In their natural habitat, C. riisei primarily feeds on small invertebrates from the water surface. In captivity, they readily accept live and frozen foods such as Daphnia, bloodworms, and Cyclops. Given time, they can adapt to dried alternatives. Offering a varied diet ensures their optimal health and vitality.

Reproduction & Dimorphism

The Swordtail Characin exhibits an intriguing method of reproduction where males inseminate females through anal fin hooks. Successful breeding requires conditioning adult fish in mixed-sex groups under specific water conditions. Females may retain fertilized eggs until favorable conditions. Fry care involves the use of a separate tank with suitable lighting, plant cover, and gentle filtration, with attention to feeding and water changes for optimal growth.

Habitat and Distribution

This freshwater species is native to coastal rivers and tributaries in northern Venezuela, the Villavicencio area in Colombia, and the island of Trinidad. C. riisei has been found in diverse habitats ranging from slow-moving, silt-laden waters to flowing, clear environments in Trinidad.