Napo cory

Gastrodermus napoensis

Also known as Corydoras napoensis, Napo catfish, Napo Spotted Cory

FreshwaterFish

Care at a glance

Temperature
72–79°F
22–26°C
pH
6.0–7.4
Adult size
2 in
5 cm
Minimum tank
16 gal
60 L
Temperament
Peaceful
Social behavior
Shoaling
Swim level
Bottom
Difficulty
Easy
Breeding
Medium
Rarity
Common
Family
Callichthyidae
Origin
Upper Amazon in Ecuador and Peru, including the rio Napo and rio Nanay.

Overview

Keep Napo cories in a group of six or more over smooth sand at 22 to 26 C in soft, slightly acidic water. They are peaceful and active, and they suit a quiet planted community. Offer sinking pellets and small frozen foods such as bloodworm and daphnia.

In the wild

The Napo cory forages over sand in soft, slightly acidic tributaries of the upper Amazon. It lives in slow, shaded water among leaf litter and wood. The fish stay in groups on the open bottom.

Good to know

This is a small member of the elegans group, patterned with broken dark lines that form a loose net over a golden body. The 2024 revision placed it in the genus Gastrodermus as Gastrodermus napoensis. Males carry a dark blotch in the dorsal fin that females lack.

Did you know

Male Napo cories carry a dark mark in the dorsal fin, which is the easiest way to tell them from females.

Weekly picks

Tank mates

Napo cory is a peaceful, shoaling species that keeps to the bottom. These picks share a community profile with it, are safe together in both directions, and overlap on water type, temperature and pH.

Check the full mix in the stocking calculator

Common questions

What size tank does a Napo cory need?

A Napo cory needs at least 16 gal (60 L). It spends most of its time in the bottom.

What temperature and pH does a Napo cory need?

A Napo cory is comfortable at 72–79°F (22–26°C) with a pH of 6.0–7.4.

How big does a Napo cory get?

An adult Napo cory reaches about 2 in (5 cm).

Does a Napo cory need a group?

Yes. A Napo cory is a shoaling species and should be kept in a group, not singly.

Related species