Gasterosteus aculeatus Linnaeus, 1758 .

Threespine Stickleback. To 11 cm (4.3 in) TL (Eriksen et al. 2020). Widespread Northern Europe and North America (Fricke et al. 2020); Korean Peninsula to Seas of Japan and Okhotsk to Bering, Chukchi, and Beaufort Seas, and Gulf of Alaska to Monterey Bay, central California (Love et al. 2016b). In fresh water as far south as Rio Rosario, northern Baja California (Miller and Lea 1972). Anadromous and resident freshwater forms; shallow vegetated areas, including marshes; depth: to about 27 m (90 ft), recorded near surface as far as 805 km (500 mi) offshore (Love et al. 2016b). Single records at 61 m (200 ft) (NWFSC-FRAM) and, particularly, 505 m (1,656 ft) from western Sakhalin Island (Kim and Kim 2019), were made with bottom trawls and may represent catches made in midwaters upon deployment or retrieval.