Gold Similis Cory (Corydoras sp. CW021) Care Guide

An undescribed Corydoras of the similis / axelrodi complex traded as CW021 Gold Similis, a peaceful sand-sifting shoaler for soft-water community tanks.

Overview

CW021 is an undescribed callichthyid catfish circulated as Gold Similis, with stronger golden colouration than typical members of its group. PlanetCatfish discussions place it close to Corydoras axelrodi rather than firmly to C. similis, and it may eventually be described as its own species or treated as a regional variant. It is a peaceful bottom-dwelling shoaler.

Taxonomy

Family: Callichthyidae
Genus: Corydoras
Scientific name: Corydoras sp. CW021
Status: undescribed aquarist 'CW-number' line of the similis / axelrodi complex; sources discuss it as Corydoras cf. axelrodi, not a formally described species

Habitat

The closely related Corydoras similis is native to South America in tributaries of the rio Madeira, with the holotype from an inflow near Ariquemes, Brazil. That region is described as having slow-moving waters, sandy substrates and abundant vegetation, the kind of habitat associated with this complex of bottom-dwelling catfish.

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 to protect the barbels

Diet

An omnivore that forages along the bottom, sifting sand for food. It accepts sinking prepared foods together with frozen and live items. A varied diet supports condition and colour.

Compatibility

Temperament is peaceful; hobbyist accounts describe the related similis-type corys as somewhat shy. It is best kept in groups of six or more with calm community fish such as small tetras and rasboras, and away from aggressive cichlids.

Breeding

It is an egg-depositor with intermediate breeding difficulty. Because CW021 sits within a complex of very similar forms, keeping it apart from look-alike Corydoras is advised if controlled breeding is intended.