Esox masquinongy × Esox lucius
Take a muskie and a northern pike, cross them, and you get something meaner than both parents. Tiger muskies are sterile hybrids stocked by state agencies specifically for trophy fishing — they grow fast, fight hard, and display one of the most striking color patterns in freshwater: bold dark bars over a golden-green body that looks painted on. Because they're sterile, they dump all their energy into growth instead of reproduction, which means they pack on weight faster than either parent species.