LAKE TROUT (MACKINAW)
Dark gray or gray green above, belly
light gray to white.
Irregular shaped light gray spots on back, sides, dorsal
fin and tail. Pink or blue spots ABSENT. White borders
on fins less distinct than in BROOK TROUT. Tail deeply forked. Inhabits only large, deep lakes. INTRODUCED.

Illustration by Joseph Tomelleri.
Links to more information about Lake Trout:
Idaho Chapter of the American Fisheries Society