Evelyn's Corydoras Care Guide
Corydoras evelynae is a small cory from the upper Solimões River, listed as Data Deficient and kept in peaceful schooling groups.
Compiled by Aquairi from published sources · Published · Updated
Overview
Corydoras evelynae is a small armoured catfish of the family Callichthyidae described by Fritz Rössel in 1963. Its name is thought to honour Evelyn Axelrod, and it is a peaceful, schooling bottom-dweller marked by a dark dorsal saddle and fine peppering.
Taxonomy
- Family: Callichthyidae
- Genus: Corydoras
- Scientific name: Corydoras evelynae
Habitat
The species is recorded from the upper Solimões River, in Colombia and probably eastern Brazil. It is a tropical freshwater fish living near the bottom.
Tank requirements
- Minimum tank volume: 80 L
- Temperature: 22-26 °C (72-79 °F)
- pH: 6.0-7.5
- GH: 2-12 °dGH
- School size: 6 or more individuals
- Lifespan: 5-10 years
- Substrate: soft sand
Diet
Corydoras evelynae is an omnivore that forages along the substrate. In aquaria it accepts sinking dried foods supplemented with small live and frozen items.
Compatibility
A peaceful bottom-dwelling species best kept in groups of six or more. It suits community aquaria with tetras, rasboras and otocinclus and should not be combined with aggressive cichlids.
Breeding
The species is oviparous. The female holds a batch of 2-4 eggs between her pelvic fins while the male fertilises each batch over about 30 seconds, then attaches the sticky eggs to the substrate, repeating until roughly 100 eggs are deposited.
Conservation status
IUCN Red List: Data Deficient.
Breeding Corydoras evelynae (Evelyn's Cory)
Overview
Corydoras evelynae (now also placed in the genus Hoplisoma as Hoplisoma evelynae) is an armoured catfish (family Callichthyidae) from the Amazon River basin, including the upper Solimões River in Colombia, reaching a maximum standard length of about 4 cm. It is an egg-laying species that spawns in the Corydoras T-position.
Sexing
As in other Corydoras, females grow larger and become broader and deeper-bodied than males when sexually mature, an effect most visible from above when females are full of eggs.
Breeding Setup
- Temperature: 22–26 °C
- pH: 6.0–8.0
- Hardness: 2–25 dH
- Provide glass, fine-leaved plants and/or spawning mops as deposition surfaces (general Corydoras practice; flagged)
Spawning Behavior & Trigger
The female holds a batch of between 2 and 4 eggs between her pelvic fins, and the male takes around 30 seconds to fertilise each batch. The female then swims to a suitable spot and attaches the very sticky eggs to a substrate. This process is repeated until around 100 eggs have been fertilised and stuck to a substrate.
Egg & Fry Care
Following the general Corydoras pattern (flagged: not species-specific timing for C. evelynae), eggs hatch within a few days and the fry take small live foods such as microworm and Artemia nauplii once free-swimming. Maintain excellent water quality and rear fry over a thin layer of sand.