Squalus acanthias (Spiny Dogfish)

Squalus acanthias, commonly known as the spiny dogfish, is a small, elongated shark found in temperate and subtropical waters worldwide. It typically measures about 3-4 feet long and has a sleek body with a distinctive spiny dorsal fin. This shark is known for its slow movement and longevity, often living over 70 years. It feeds mainly on small fish and invertebrates, and is an important species for commercial fishing. Despite its name, the spiny dogfish is generally harmless to humans. Its resilience and reproductive habits make it an important subject of marine study and conservation.