Dimensioned pair of elevation illustrations of the Brook Trout seen from the side and front

The Brook Trout (Salvelinus fontinalis) are also called Eastern brook trout, mud trout, squaretail, and brook charr. It is a freshwater salmon fish to the family Salmonidae and native to Eastern North America but recently introduced in some parts of Europe and Asia. Brook trout are migratory fish with some reproducing in freshwater and spending their adult life in ocean water.

Brook Trout love areas with a spring-fed stream with sand and gravel. The animal can mate with relatively similar species to produce a hybrid. They are identified by their dark green to brown color, body with lighter shades but highly recognizable marble pattern.

Brook Trouts have a total length between 10”-26” (25-66 cm), body height of 2”-5.5” (5-14 cm), and an overall weight in the range of .6-6.6 lb (.3-3 kg). The typical lifespan of the Brook Trout is 5-15 years.


*Under Development*

2”-5.5” | 5-14 cm
10”-26” | 25-66 cm
.6-6.6 lb | .3-3 kg
Scientific Name:
Salvelinus fontinalis
5-15 years


Drawings include:

Brook Trout side elevation, front

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Freshwater fish are fish that spend some or all of their live in water with a salinity level lower than .05%. Freshwater fish, due to the segmented nature of ponds, lakes, and rivers, are subject to speciation similar to species on islands.