Gempylus is a genus of fish belonging to the family Gempylidae, commonly known as snake mackerels. These fish are characterized by their elongated bodies and streamlined shape, which help them swim quickly in the ocean. They are typically found in warm, deep waters and are known for their predatory behavior, feeding on smaller fish and squid. The most well-known species within this genus is Gempylus serpens, often referred to as the snake mackerel. This species can grow up to 2 meters in length and is recognized for its dark blue or greenish coloration. Gempylus species are also notable for their high oil content, which can sometimes lead to digestive issues in humans if consumed in large quantities.