Narke capensis, also known as the Cape numbfish, is a species of electric ray found in the waters off the coast of southern Africa. It is a relatively small ray, reaching a maximum size of 38.0 cm.
Description & Characteristics
Narke capensis has a distinctive flattened body shape, characteristic of rays, with large pectoral fins that are fused to the head, giving it a rounded appearance. Its dorsal surface is typically a dark brown or grey color, often with scattered white spots, while the ventral surface is lighter in color. The eyes of this species are small and located on the dorsal surface of the head. The mouth is located on the ventral surface, and the gill slits are situated on the underside of the head, just behind the pectoral fins. Like other members of the family Narkidae, this species possesses a pair of strong electric organs located on the sides of its head. These organs are capable of producing a powerful electric shock that is used for defense and to stun prey.
Habitat and Occurrence
Narke capensis is a benthic species, meaning it lives on the bottom of the ocean floor. It is typically found in shallow to moderately deep waters, with a depth range of 20.0 to 183.0 meters. This species is particularly common in coastal areas, often inhabiting sandy or muddy bottoms. Narke capensis is primarily found in the South African marine zones, where it is a prevalent presence in these aquatic ecosystems.
Taxonomy
Narke capensis belongs to the Class: Elasmobranchii, Order: Torpediniformes, and Family: Narkidae. The class Elasmobranchii encompasses sharks, rays, and skates, all of which are characterized by cartilaginous skeletons and the presence of gill slits. The Order Torpediniformes, which includes the electric rays, is distinguished by the possession of specialized electric organs used for defense and hunting. The Family Narkidae, also known as the numbfishes, consists of a small group of rays with a distinctive flattened body shape and a pair of strong electric organs.
Feeding
Narke capensis is a carnivorous species and feeds primarily on invertebrates, such as crustaceans and polychaete worms. It uses its electric organs to stun prey before consuming them. The species also plays a role in the marine ecosystem by consuming a variety of invertebrates, contributing to the overall balance of the marine food web.
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