Gasterosteus aculeatus (Linnaeus, 1758)

Gasterosteus aculeatus (Linnaeus, 1758)

Gasterosteus aculeatus (Linnaeus, 1758)

Gasterosteus aculeatus (Linnaeus, 1758)

Gasterosteus aculeatus (Linnaeus, 1758)

Gasterosteus aculeatus (Linnaeus, 1758)

Gasterosteus aculeatus (Linnaeus, 1758)

Gasterosteus aculeatus (Linnaeus, 1758)

Gasterosteus aculeatus (Linnaeus, 1758)

Gasterosteus aculeatus (Linnaeus, 1758)

Gasterosteus aculeatus (Linnaeus, 1758)

Gasterosteus aculeatus (Linnaeus, 1758)

Gasterosteus aculeatus subsp. 1

Gasterosteus aculeatus subsp. 1

Gasterosteus aculeatus subsp. 1

Gasterosteus aculeatus subsp. 1

Swimming juvenile three-spined sticklebacks Gasterosteus aculeatus

Threat behavior of three-spined stickleback Gasterosteus aculeatus

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)

Digging behavior of three-spined stickleback Gasterosteus aculeatus

Nesting of three-spined stickleback Gasterosteus aculeatus - Tunneling

Courtship behavior of female three-spined stickleback Gasterosteus aculeatus

Egg care of male three-spined stickleback Gasterosteus aculeatus