Salmo salar (Linneaus 1758; up to 1m) is the extant Atlantic salmon. The toothy premaxilla extends horizontally while the dentary curls dorsally, leaving the mouth open permanently. The nares appear at a gap between the premaxilla and nasals. The young hatch in fresh water, then swim out to sea.
Percopsis omiscomaycus (Agassiz 1849, originally Salmo omiscomaycus Walbaum 1792; average 9cm up to a rare 20cm) is the extant trout-perch, apparently a smaller version of Salmo, traditionally used to bait larger fish more prized by humans.
Agassiz L 1849. Two new fishes from Lake Superior. Proc. Boston Soc. Nat. Hist. v. 3 (1848–1851): 80–81.
Linnaeus C 1758. Systema naturæ per regna tria naturæ, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Editio decima, reformata.
