Description

Also known as Barnstickle, Barnystickle, Burnstickle, Common Stickleback, Cushy, Doctor, Eastern Stickleback, European Stickleback, Jacksharp, New York Stickleback, Pinfish, Prickly, Prickly Back, Saw-finned Stickleback, Spanicle, Spannistickle, Spanny, Spawn, Spawnticle, Thornback, Threespine Stickleback, Tiddler, Twospine Stickleback.

Found in schools, over mud and sand bottoms, in both freshwater and marine habitats, over shallow to very deep estuaries, coastal shorelines, lakes, rivers and streams rich in vegetation.
They feed on crustaceans, insects, larvae, small fish and worms.
Juveniles found with drifting seaweeds.
Length - 11cm
Depth - 0-100m
Worldwide

These fish are related to Pipefishes and Seahorses as they have no scales and some have bony armour plates. The males also guard their nest! Ref: http://www.fishbase.org/summary/2420