This species can occasionally reach lengths of 8 cm (3.1 in), but lengths of 3–4 centimetres (1.2–1.6 in) at maturity are more common. The body is laterally compressed. The base of the tail is slender. The caudal fin has 12 rays. The dorsal fin has 10–14 rays; in front of it are the three spines that give the fish its name (though some individuals may have only two or four). The third spine (the one closest to the dorsal fin) is much shorter than the other two.
Maximum size: 10cm
Origin: Northern Hemisphere
Ideal number kept together: 1+
Hardness: 124-874 ppm
Temperature: 2–18 °C
Ease of care
In its different forms or stages of life, the three-spined stickleback can be a bottom-feeder.
The food we recommend is Pond fish flake or a Pond pellet.
In general this fish species isn’t aggressive.
Breeding / Sex
Egg laying species, easy – moderate difficulty