Three-Spined Stickleback (Gasterosteus aculeatus aculeatus)

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Three-Spined Stickleback

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Three-Spined Stickleback

Gasterosteus aculeatus aculeatus

76 Litres (20 US G.)

5-8 cm (2-3.1")


1 - 1.025


6.0 - 9.0

4 -20 °C (39.2-68°F)

2-20 °d

1:2 M:F

Pellet Foods
Flake Foods
Live Foods

5-8 years



Additional names

Three-Spined Stickleback

Additional scientific names

Gasterosteus aculeatus, Gasteracanthus cataphractus, Gasterosteus aculeatus messinicus

Sexing[edit | edit source]

The belly of sexually mature males will turn orange.

Environment specifics[edit | edit source]

May exist in freshwater, but more commonly prefer brackish water. This fish enjoys vegetation.

Identification[edit | edit source]

Commonly 4-5cm (1.6-2"). This fish has 1 spine on each pelvic fin in addition to its 3-4 dorsal spines. There are 28 (or more) bony plates on each side of the fish. The caudal peduncle is narrow with a short, lateral keel.

Pictures[edit | edit source]

External links[edit | edit source]