KINGDOM Animalia
PHYLUM Chordata
CLASS  Actinopterygii (ray-finned fishes)
ORDER Gasterosteiformes (Sticklebacks and seamoths)
FAMILY Gasterosteidae (Sticklebacks and tubesnouts)
GENUS/SPECIES  Gasterosteus aculeatus




Common length : 5.1 cm or 2 in.  Identified by the 3 to 4 sharp, free spines before the dorsal fin, the pelvic fin reduced to a sharp spine and a small ray, the series of plates along the sides of the body and are usually mottled brown or greenish.



 Coastal oceans in northern Europe, Asia and North America

 Freshwater streams, estuaries


DIET: worms, aquatic insects, fish eggs and fry


REPRODUCTION:  Red means ready.  At mating time, the chin and belly of male sticklebacks turn red. The brighter the red, the more enticing they are to the females they’re courting. Male sticklebacks weave rounded nests of algae, leaves and pebbles.   The neater the nest, the more likely a male is to woo a mate to lay her eggs inside. Once she does, he drives her out, guards and aerates the eggs until the hatch.


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