维氏鮰 · Charco Palma Pupfish

Overview

Cyprinodon veronicae originated from a very restricted spring habitat in Nuevo León, Mexico. Severe historical drying makes clear identification and provenance particularly valuable in captive stocks. Breeding males develop a violet-blue appearance.

Distribution & habitat

The only established locality is Ojo de Agua Charco Azul, also called Barreno, in the Aramberri area. It formed part of the spring system within the former Sandia lake basin. The clear, well-vegetated historical habitat lay at approximately 1600 m elevation, with recorded water temperatures around 19–20 °C.

A spring-fed oasis once supported abundant vegetation in the surrounding semiarid landscape. Water extraction led to drying from the late 1990s, with severe consequences for endemic fishes. A historical habitat temperature should not be treated by itself as a complete aquarium maintenance range.

Aquarium setup

A footprint around 60 × 30 cm is only marginally suitable for a pair; groups require larger accommodation. Plants, mops, and similar cover should break sightlines and provide numerous sheltered areas.

Where filtration is used, an air-driven sponge filter reduces risk to eggs and fry. Lighting is not a central requirement. Some filamentous algal growth can be encouraged without stripping the aquarium of cover for display purposes.

Sexual dimorphism

Breeding males turn violet-blue and show six or seven diffuse dark bars across the upper half of the flanks. Females have an irregular dorsal-fin eyespot containing a small, roughly crescent-shaped dark mark.

Notes

It is one of the endemic fishes described from separate springs in the Sandia system. In a fish with such restricted origins and major habitat change, color can support identification but cannot replace provenance and stock records.