Swimming juvenile three-spined sticklebacks Gasterosteus aculeatus

Threat behavior of three-spined stickleback Gasterosteus aculeatus

Digging behavior of three-spined stickleback Gasterosteus aculeatus

Nesting of three-spined stickleback Gasterosteus aculeatus - Tunneling

Fanning behavior of three-spined stickleback Gasterosteus aculeatus (2)

Fanning behavior of three-spined stickleback Gasterosteus aculeatus (3)

Fanning behavior of three-spined stickleback Gasterosteus aculeatus (1)

Territorial defense of male three-spined stickleback Gasterosteus aculeatus

Courtship behavior of female three-spined stickleback Gasterosteus aculeatus

Egg care of male three-spined stickleback Gasterosteus aculeatus

Courtship and navigation behavior of three-spined stickleback Gasterosteus aculeatus

'Zigzag dance' courtship behavior of three-spined stickleback Gasterosteus aculeatus

Courtship behavior of female three-spined stickleback Gasterosteus aculeatus (2)

a male three-spined stickleback Gasterosteus aculeatus with nuptial coloration

Threat behavior of three-spined stickleback Gasterosteus aculeatus against Moroco steindachneri

Interruption of courtship behavior of male three-spined stickleback Gasterosteus aculeatus

Threat behavior of three-spined stickleback Gasterosteus aculeatus against Red swamp crayfish

Fanning behavior and repair of nest in three-spined stickleback Gasterosteus aculeatus

Male three-spined stickleback Gasterosteus aculeatus under fanning turned out a female

Nesting of three-spined stickleback Gasterosteus aculeatus - Nest forming with its mouth

'Zigzag dance' and nest-introducing behavior of three-spined stickleback Gasterosteus aculeatus (2)

'Zigzag dance' and nest-introducing behavior of three-spined stickleback Gasterosteus aculeatus (1)

A male three-spined stickleback Gasterosteus aculeatus refused the courtship from a female

Tinbergen's Experiment - Key stimulus releasing fighting behavior of three-spined stickleback Gasterosteus aculeatus

Egg-predation defense by the deception of a male three-spined stickleback Gasterosteus aculeatus