Fin's Fish Guide
The Smallhead stickleback (Gasterosteus microcephalus) is a freshwater fish of the family Gasterosteidae that grows up to 6 cm.
Description
The smallhead stickleback is a small stickleback from fresh water of western North America. The species grows to about 6 cm and has a slender, silvery body with separate spines before the dorsal fin and bony side plates instead of scales. As a near-bottom fish it lives in clear streams and pools; the male builds a nest and guards the eggs and young. It feeds on small invertebrates and insect larvae. The fish is harmless to humans. The IUCN has not evaluated the species.
Frequently asked questions
How do you recognise the Smallhead stickleback?
The Smallhead stickleback has a torpedo-shaped body, is mainly silver-grey and shows a plain pattern. Separate dorsal spines and bony lateral plates; nest-building male
Where does the Smallhead stickleback live?
The Smallhead stickleback lives in fresh water and is mostly found around sand or mud bottom. Western North America
How big does the Smallhead stickleback get?
The Smallhead stickleback grows to a maximum of about 6 cm.
Is the Smallhead stickleback dangerous to humans?
No, the Smallhead stickleback is harmless to humans. This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status.
Is the Smallhead stickleback edible?
The Smallhead stickleback is not usually eaten.
More photos
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Gasterosteus
More from the family Gasterosteidae
Want the complete picture on the Smallhead stickleback?
Point your camera at the fish and Fin names the species in seconds. Free, and the Smallhead stickleback is one of 12,519 species in the app.