Knowing the genus name, such as *Ictalurus*, often helps narrow down what about the fish being observed?

Answer

Likely habitat and general life strategies

By focusing on the genus, one can immediately narrow down the likely habitat and general life strategies of the fish being observed, such as identifying *Ictalurus* as North American freshwater.

Knowing the genus name, such as *Ictalurus*, often helps narrow down what about the fish being observed?
taxonomybiologyfishScientific nameCatfish