How Much Chromosomes Do Fish Have in the USA

Most fishes have between 40 and 60 chromosomes, with 48 a generally accepted number for some common ancestral fish. Which fish has most chromosomes? The highest chromosome count of any vertebrate to date (2n ~ 446) was documented in Ptychobarbus dipogon, a cyprinid fish from the Tibetan Plateau. Critically endangered sturgeons, having undergone three whole…