The popular sport fishes in this family are distinguished by their wedge-shaped heads, large mouths with abundant teeth, and anal and dorsal fins positioned opposite each other near the tail. There are few species in the family and only one genus, Esox, but it is widely distributed in North America, Europe and Asia. All species are relatively large, predatory fish. Four species are native to New York and are found in most drainages, although their distribution is enhanced by introductions into new lakes and river systems. All four species typically live in slow-water streams, lakes and ponds in close proximity to aquatic vegetation.