The bluefish is a species of popular marine game-fish found in all climates. It is the sole species of the Pomatomidae family. The bluefish is a moderately proportioned fish, with a broad, forked tail. The spiny first dorsal fin is normally folded back in a groove, as are its pectoral fins. Coloration is a grayish blue-green dorsally, fading to white on the lower sides and belly. Its single row of teeth in each jaw are uniform in size, knife-edged and sharp. Bluefish commonly range in size from seven inches to much larger, sometimes weighing as much as forty pounds, though fish heavier than twenty pounds are exceptional.