A member of the charr group of the Salmonidae family, the splake is a distinctively marked hybrid ﬁsh produced in a hatchery by crossing a true lake trout female (S. Namaycush) and a true brook trout male (S. fontinalis). This interbreeding does not occur in nature but is initiated by humans and results in a fertile hybrid species capable of reproducing.
IdentificationThe splake is difﬁcult to identify externally because it resembles different aspects of both parents. The body shape is intermediate between the heavier lake trout and the slimmer brook trout. The shape of the tail is also intermediate.
It is not as deeply forked as that of the lake trout and more closely resembles the slightly indented tail of the brook trout. In coloration and markings, the splake more closely resembles the brook trout. It has vermiculations like brook trout, red-orange ventral ﬁns, and yellowish spots along its ﬂanks.