Taxonomic group
Members of the ray‑finned fish family Gasterosteidae.
Stickleback
Sticklebacks (family Gasterosteidae) are small ray‑finned fishes found across Holarctic fresh, brackish, and marine waters.
sticklebacks
Last Updated Mar 9, 2026 · 2 sources
Species Guide
What to know about sticklebacks
A clean field guide focused on habitat, identification, behavior, and conservation context without burying the useful parts.
Sticklebacks are members of the fish family Gasterosteidae. They are ray‑finned fishes with a Holarctic distribution and occur in fresh, brackish, and marine environments. Taxonomically, they were once considered related to pipefish and seahorses but are now thought to be more closely related to eelpouts and sculpins.
The strongest linked planning options currently surface around destinations such as Kreidesee Hemmoor, Lake Constance (Bodensee), Crete and countries such as Germany, Netherlands, Croatia for divers building trips around sticklebacks.
Identification
How to identify sticklebacks
The visual markers divers can use underwater, plus the species most likely to cause confusion.
Key identification markers
Responsible Encounters
How to dive with sticklebacks
Conservation-minded guidance for divers who want the encounter without adding pressure.
