Alopias vulgaris, commonly known as the common thresher shark, is a species of shark found in temperate and tropical oceans worldwide. It is recognized for its long, slender body and distinctive long tail, which can be up to half its total length. This shark typically grows to about 3 to 4 meters (10 to 13 feet) in length and is known for its agility and speed. The common thresher shark primarily feeds on small fish and squid, using its tail to stun prey. It is a pelagic species, often found in open waters, and is known for its unique hunting technique. Alopias vulgaris is also of interest to fisheries and is sometimes caught for sport.