Smallhead stickleback

The smallhead stickleback (Gasterosteus microcephalus) is a stickleback. Some authorities think it is a synonym of Gasterosteus aculeatus or a subspecies of that taxon.

Smallhead stickleback
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Scorpaeniformes
Family:	Gasterosteidae
Genus:	Gasterosteus
Species:	G. microcephalus
Binomial name
Gasterosteus microcephalus Girard, 1854
Synonyms
Gasterosteus aculeatus microcephalus Girard, 1854

References

1. Froese, Rainer; Pauly, Daniel (eds.) (2022). "Gasterosteus microcephalus" in FishBase. August 2022 version.