Nebrius
Nebrius is a genus of sharks in the family Carcharhinidae, commonly known as the “whaler sharks.” This genus contains a single species, Nebrius ferrugineus, the “dusky whaler shark” or “bronze whaler.” The dusky whaler shark is a large, robust shark that is widespread in tropical and subtropical waters around the world.
Characteristics
Dusky whaler sharks are characterized by their broad, flattened heads, large, rounded snouts, and powerful bodies. They have two dorsal fins, the first being much larger than the second, and a crescent-shaped tail fin with a pronounced lower lobe. Their coloration is typically bronze or brown on the dorsal surface, with a lighter underside. They can reach lengths of up to 3.5 meters (11.5 feet) and weights of up to 350 kilograms (770 pounds).
Environment
Dusky whaler sharks are found in a variety of habitats, including coastal waters, estuaries, and offshore reefs. They prefer warm, temperate waters with temperatures ranging from 15 to 28 degrees Celsius (59 to 82 degrees Fahrenheit). They are typically found at depths of up to 200 meters (656 feet).
Diet
Dusky whaler sharks are opportunistic predators, feeding on a wide range of prey, including fish, cephalopods, crustaceans, and other sharks. They are known to be particularly fond of bony fish, such as tuna, mackerel, and snapper. Their diet can also include sea turtles, seabirds, and even marine mammals.
Reproduction
Dusky whaler sharks are viviparous, meaning that they give birth to live young. Females produce litters of 2 to 15 pups after a gestation period of 12 to 15 months. The pups are born fully developed and are able to swim and hunt on their own.
Conservation Status
The dusky whaler shark is listed as "Near Threatened" by the International Union for Conservation of Nature (IUCN). They are vulnerable to overfishing and habitat degradation.
References