Bull trout populations are also in danger from hybridization with non-native brook trout. Landlocked salmon and brook trout can be caught. Fish include brown, rainbow, and brook trout. Shrews can also swim, which makes them prey to brook trout. Robert J. Behnke describes three ecological forms of the brook trout. The West Branch is home to landlocked salmon and Brook Trout. The fish are lake trout, brown trout and brook trout. Of the immediate threats to brook trout populations in Maryland, urbanization is the most serious. Fishing opportunities abound in the Bighorns, with a high prevalence of brook trout. Rattlesnake Brook is stocked with brook trout in spring. Typical lengths of the brook trout vary from , and weights from . Fish species include mackinaw trout, rainbow trout, and brook trout. One such example is the tiger trout, a hybrid with the brook trout. Cliffside Lake, in particular, is stocked with Rainbow, Brown and Brook Trout. Curly Philips is credited with stocking Maligne Lake with brook trout, packed overland in barrels.