Tiger Trout & Splake
Most hybrids are the offspring of two species in the same genus. However, in some rare cases, hybrids can occur between two species in two different genera. Tiger trout are good examples of this. Tiger trout are a cross between brown trout (Salmo trutta) and brook trout (Salvelinus fontinalis). They are commonly created in fish hatcheries and stocked in lakes and rivers for sport-fishing. However, like most hybrids, they are sterile.
On the other hand, splake, which are a cross between a male brook trout (Salvelinus fontinalis) and a female lake trout (Salvelinus namaycush), are fertile. Splake are also stocked in lakes and rivers for sport-fishing, but even though they are fertile, they do not commonly produce offspring.