Y E S I T D O ... Definitely Lotic Though!!!
As rainbow trout grow longer, they increase in weight. The relationship between length and weight is not linear. The relationship between total length (L, in inches) and total weight (W, in pounds) for nearly all species of fish can be expressed by an equation of the form:
Invariably, b is close to 3.0 for all species, and c is a constant that varies among species. For lentic rainbow trout, b = 2.990 and c = 0.000426, and for lotic rainbow trout, b = 3.024 and c = 0.000370.
The relationship described in this section suggests that a 13-inch lentic rainbow trout will weigh about 1.0 pound, while an 18-inch lentic rainbow trout will weigh about 2.5 pounds.