Goldbreast splitfin

Ilyodon furcidens

Also known as Goldbreast goodeid, Trout goodeid

FreshwaterFish

Care at a glance

Temperature
64–79°F (18–26°C)
pH
7.0–8.0
Adult size
3.9 in (10 cm)
Minimum tank
24 gal (90 L)
Temperament
Mostly peaceful
Social behavior
Social
Swim level
Middle
Difficulty
Medium
Breeding
Easy
Rarity
Rare
Origin
Native to Pacific slope rivers of Colima, Jalisco, and Michoacan, Mexico, such as the Rio Armeria and Rio Coahuayana, in flowing, well oxygenated water.
Family
Goodeidae

Overview

Keep a group of six or more in a longer tank of 90 liters or larger at 18 to 26 C, pH 7.0 to 8.0, in medium hard to hard water with brisk flow. Feed a varied diet of vegetable flake, algae, and frozen foods such as daphnia and bloodworm. They are mostly peaceful but boisterous and fast, so pick tankmates that can handle active company. Males squabble but rarely cause real damage.

In the wild

A streamlined, active goodeid built for current, so give it a longer tank with good flow and high oxygen. Males can show a golden to orange breast and yellow edged fins. They graze algae heavily in the wild and also chase small invertebrates. Open swimming lanes with some rockwork suit their fast, restless habits.

Good to know

Ilyodon furcidens is a matrotrophic livebearer whose fry develop with trophotaeniae and are born large and well formed. The genus is variable, and tooth and body shape differ between populations that mainly graze algae and those that feed more on invertebrates. Adults can reach about 10 cm.

Did you know

Their trout like shape and love of current are why hobbyists often call them trout goodeids.

Where to buy

Some links may not be the exact species or variety.

…or ask your local fish store.

Appears in

Freshwater fish · Coldwater fish

Keeping Goldbreast splitfin?

Track water tests, reminders and stocking fit.

Sign in or Start a tank →

Related species