Threespine Stickleback
NameThreespine Stickleback
Scientific NameGasterosteus aculeatus
Common NamesThreespine Stickleback, Three-spined Stickleback
FamilyGasterosteidae
OriginNorthern Hemisphere, North America, Europe, Asia
Temperamentsemi-aggressive
Dietcarnivore
Care Levelintermediate
Minimum Tank Size (Gallons)10
Max Size (Inches)4
Water TypeFreshwater
Temperature Range (°F)50-70
pH Range6.5-8.0
Compatible SpeciesOther Threespine Sticklebacks (in a sufficiently large tank with hiding spots), Robust, similarly sized cool-water minnows (with caution)
Description
The Threespine Stickleback is a small, hardy fish characterized by its three prominent dorsal spines. Males display vibrant red coloration during breeding season, as seen in the image, to attract mates and defend their nests. This adaptable species is found in a wide range of freshwater, brackish, and marine environments across the Northern Hemisphere.
