Atelomycterus
Atelomycterus is a genus of deep-sea sharks belonging to the family Dalatiidae, commonly known as the “sleeper sharks”. This genus includes a small number of species that are found in various oceanic regions around the world, typically inhabiting the deep, cold waters of the continental slopes and abyssal plains.
Common Names
Species within the Atelomycterus genus are commonly referred to as "sleeper sharks" due to their sluggish movements and tendency to rest on the seafloor.
Characteristics
Atelomycterus sharks possess several distinct characteristics that differentiate them from other deep-sea shark species. These include:
- Slender body shape: They have a long, thin body with a pointed snout.
- Large eyes: Their eyes are relatively large, likely an adaptation for low-light conditions in their deep-water habitat.
- Small gill slits: They have five small gill slits on each side of their head.
- Dorsal fin spines: Two dorsal fins are present, with spines on the first dorsal fin.
- Small anal fin: The anal fin is very small or absent.
- Teeth: Their teeth are small and numerous, adapted for grasping and holding prey.
Environments
Atelomycterus sharks are primarily found in deep-sea environments, typically residing on the continental slopes and abyssal plains at depths ranging from 500 to 2,500 meters. These environments are characterized by low light, high pressure, and cold temperatures.