Page 2: Research news on mackerel sharks (order)

Mackerel sharks are members of the order Lamniformes, a group of predatory cartilaginous fishes within the class Chondrichthyes. This order is characterized by a fusiform body, conical snout, large jaws with well-developed, often serrated teeth, and a heterocercal tail adapted for sustained, high-speed swimming. Lamniformes typically possess two dorsal fins without spines, an anal fin, five gill slits, and relatively large, oil-rich livers that aid buoyancy. Many species exhibit regional endothermy via countercurrent heat exchangers (retia mirabilia), enabling elevated body or muscle temperatures. The order includes ecologically significant apex and mesopredators such as the great white shark (Carcharodon carcharias) and the shortfin mako (Isurus oxyrinchus).