141651 Three-spined Stickleback Gasterosteus aculeatus Length to 10cm
Familiar freshwater ‘tiddler’ that also occurs in estuaries and brackish lagoons. Adult has slender body, elongate tail stock and 3 spines (2 long, 1 short) in front of dorsal fin. Mostly yellowish-green above, silvery below; breeding male has red belly and blue eyes. Widespread and locally common.