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Fish Freshwater Care: easy Semi-aggressive

Purple-spotted Gudgeon

Mogurnda mogurnda
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Other names: Northern purple-spotted gudgeon, Mogurnda
Group: Oddballs and specialty fish · Family: Eleotridae · Origin: Australia — rivers and streams of northern Australia

A colorful Australian fish with red, orange and blue spots on a brown-purple body. It reaches 10–12 cm and is tough and hardy, but it is territorial and eats small fish.

Will it suit my tank?

Last updated October 16, 2026

Temperature
22–28°C
pH
7–8
Hardness
8–18 dGH
Adult size
12 cm
Minimum tank size
100 liters
Social structure
Pair
Swimming zone
Bottom
Diet
Carnivore
Breeding
Substrate spawner

Water parameters

Temperature22–28°C
pH7–8
General hardness (GH)8–18 dGH
Recommended range
Eats small fish Eats shrimp Suitable for planted tanks

Overview

October 16, 2026 · Suggest an edit

The purple-spotted gudgeon is a colorful species from the "sleeper" family that lives in the fresh waters of northern Australia. Its brown-purple body is decorated with red, orange and blue spots; dark lines run back from the eye. In the aquarium it usually grows to 10–12 cm. It is an easy-to-keep species that tolerates hard water and temperature changes.

Tank Setup

October 16, 2026 · Suggest an edit
  • At least 100 liters for a pair.
  • Rocks, caves and roots; a hiding place for each individual.
  • Moderately hard, slightly alkaline water; gentle flow.
  • Dense plants reduce territorial fights.

Diet

October 16, 2026 · Suggest an edit

Carnivorous. Bloodworms, brine shrimp, mysis, worms and small shrimp; it also gets used to sinking granules.

Behavior and Compatibility

October 16, 2026 · Suggest an edit

Territorial and aggressive toward males of its own species. It eats small fish and shrimp that fit in its mouth. It spawns in caves and the male guards the eggs.

Good companions: medium-sized species that can defend themselves and are too big to fit in its mouth: rainbowfish, medium-sized barbs, large tetras.

Avoid: small fish, shrimp, long-finned and slow species.

A short profile for this species

The Purple-spotted Gudgeon page has the basics, but the sections below have not been written yet. If you keep this species, write a section from your own experience; it will be published under your name after editor approval.

Tank mates

This list is calculated automatically from the species profile and grows as new species are added to the catalog. Try it in the planner for a definite answer.

Usually compatible

Should not be kept together

Hobbyist notes

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Change history and contributors
  1. Page created · October 16, 2026