The largest Brook trout on record was 14.5 pounds and caught in 1916 in the Nipigon River in Ontario. Breeding males develop a hook at the front of the lower jaw.
Typical coloring is olive-green to dark brown on the back with silvery sides and pale spotting.
All colors intensify at spawning time. The brook trout is native to northern North America and is widely distributed throughout the maritime provinces. It occurs in clear, cool, well-oxygenated streams and lakes. This species spawns in late summer or autumn in gravel beds in the shallows of headwaters of streams. The female digs the redd where she lays 100-5000 eggs depending on her size.