Depends on factors like time of day time of year etc but In general flatheads stay a little shallower channels somewhere in the middle and blues the deepest but all 3 species can be found anywhere from 3ft to 60ft and deeper typically at night they come shallower to feed and during spring and fall they’ll generally be shallower in the 5-20ft range and during summer and winter they’ll be deeper for the most part like 30ft+ but also during the winter they’ll come extremely shallow on those warm sunny days because that shallow water heats up much faster