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.

White spotted rabbit snail
Tylomelania towutica
Freshwater4.3 in (11 cm) · 16 gal (60 L)75–84°F (24–29°C)
Brittan's rasbora
Kottelatia brittani
Freshwater2.4 in (6 cm) · 16 gal (60 L)68–79°F (20–26°C)
Clown killifish
Epiplatys annulatus
Freshwater1.4 in (3.5 cm) · 15 gal (55 L)68–79°F (20–26°C)
Golden dwarf cichlid
Nannacara anomala
Freshwater3.1 in (8 cm) · 16 gal (60 L)72–82°F (22–28°C)
Gold rabbit snail
Tylomelania gemmifera
Freshwater2.8 in (7 cm) · 16 gal (60 L)75–82°F (24–28°C)
Checkered barb
Oliotius oligolepis
Freshwater1.8 in (4.5 cm) · 16 gal (60 L)68–79°F (20–26°C)
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
2 in (5 cm)16 gal (60 L)72–82°F (22–28°C)Guapore cory
Gastrodermus guapore
2 in (5 cm) · 16 gal (60 L)
2.1 in (5.4 cm)16 gal (60 L)68–79°F (20–26°C)Elegant cory
Gastrodermus elegans
2.1 in (5.4 cm) · 16 gal (60 L)
1.8 in (4.5 cm)16 gal (60 L)72–79°F (22–26°C)Nain dwarf cory
Gastrodermus nanus
1.8 in (4.5 cm) · 16 gal (60 L)
1.8 in (4.5 cm)16 gal (60 L)72–79°F (22–26°C)Nijssen's cory
Gastrodermus nijsseni
1.8 in (4.5 cm) · 16 gal (60 L)
1.4 in (3.5 cm)12 gal (45 L)72–79°F (22–26°C)Nano cory
Gastrodermus gracilis
1.4 in (3.5 cm) · 12 gal (45 L)
1.3 in (3.3 cm)13 gal (50 L)72–79°F (22–26°C)Pygmy cory
Gastrodermus pygmaeus
1.3 in (3.3 cm) · 13 gal (50 L)
