In the fictional world of trout wrestling, one of the most uneven matchups would pit brook trout (Salvelinus fontinalis) against bull trout (Salvelinus confluentus). When squaring off in their aquatic ‘ring,’ the invasive and scrappy ‘brookies’ are bullies, outcompeting the native bull trout by eating all the food, hogging the best shelter and generally pushing them around. Brook trout are also opportunists, taking advantage of and spawning with bull trout.