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The following list of known freshwater fish species, subspecies, and hybrids occurring in Washington state is taken from Wydoski and Whitney(2003). Some scientific names have been updated or corrected. Trout nomenclature follows Behnke et al.(2002). Asterisks denote introduced fishes.
Mosquitofish have a 16- to 28-day gestation period. [12] They are lecithotrophic, which means during gestation, nutrients are provided to the embryos by a yolk sac. [35] If the gestation period is shorter, each newborn will at birth still have a yolk sac connected through a slit located on the ventral side of the body wall. [12]
Midshipman fish are distinguished by their photophores and four lateral lines. Typical midshipman fishes, such as the plainfin midshipman (Porichthys notatus), are nocturnal and bury themselves in sand or mud in the intertidal zone during the day, to float just above the seabed at night. Some species have venomous dorsal spines and are capable ...
The Washington Department of Fish and Wildlife and Oregon Department of Fish and Wildlife, meanwhile, prohibited retention of yelloweye rockfish caught by recreational fisheries. Commercial retention of the rockfish is prohibited except for a small 300 lb (136 kg) limit, to allow yelloweye caught dead to be retained. [ 10 ]
The state of Washington was reminded of its obligation to ensure salmon passage in a 2018 U.S. Supreme Court ruling that upheld the deadline to repair 90% of its fish-blocking culverts.
Fish typically have quite small brains relative to body size compared with other vertebrates, typically one-fifteenth the brain mass of a similarly sized bird or mammal. [59] However, some fish have relatively large brains, most notably mormyrids and sharks, which have brains about as massive relative to body weight as birds and marsupials. [60]
The bowfin (Amia calva) is a ray-finned fish native to North America. Common names include mudfish, mud pike, dogfish, grindle, grinnel, swamp trout, and choupique.It is regarded as a relict, being one of only two surviving species of the Halecomorphi, a group of fish that first appeared during the Early Triassic, around 250 million years ago.
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