The Starry Ray, Thorny Skate, scientifically known as Amblyraja radiata, is a fascinating and elusive fish species inhabiting the vast depths of the ocean. This ray, characterized by its unique features and adaptations, plays a crucial role in the delicate balance of its marine ecosystem.
Description & Characteristics
The Starry Ray, Thorny Skate, Amblyraja radiata, is a relatively large species, reaching a maximum size of 105.0 cm. It is distinguished by its flattened body shape, typical of rays, which allows it to navigate effectively across the seafloor. This ray’s coloration is generally brown to gray, adorned with numerous small white spots, giving it its namesake “starry” appearance. The presence of thorns on its back, particularly around its eyes and along its midline, contributes to the “thorny” aspect of its common name.
Habitat and Occurrence
The Starry Ray, Thorny Skate, Amblyraja radiata, is a species well-adapted to a variety of habitats, demonstrating its adaptability to diverse marine environments. Typically found at depths ranging from 5.0 to 1540.0 meters, this ray exhibits a preference for brackish water and seawater environments. Its habitat includes muddy grounds, offshore regions, open ocean stretches, and rocky, hard seabeds, showcasing its ability to thrive in various substrates. Notably, the Amblyraja radiata is frequently observed in the Mesopelagial zone, often referred to as the “twilight zone of the sea” between 200 to 1000 meters depth, making it a prevalent presence in these aquatic ecosystems.
Taxonomy
The Starry Ray, Thorny Skate, Amblyraja radiata, belongs to a large and diverse group of fishes known as cartilaginous fishes, classified under the Class: Elasmobranchii. This class includes sharks, rays, and skates. The Amblyraja radiata further belongs to the Order: Rajiformes, which encompasses all species of skates and rays. Within this order, it is classified under the Family: Rajidae, a diverse family of skates that are known for their flattened bodies and bottom-dwelling lifestyles.
Feeding
The Starry Ray, Thorny Skate, Amblyraja radiata, is a predatory species, relying on a diet of various marine invertebrates and small fish. Its feeding habits are diverse, encompassing a range of prey items, including amphipods, clam meat, clams, copepods, crabs, crustaceans, fish (little fishes), invertebrates, isopods, krill, lobster, nekton, rock shrimps, schrimps, sea squirts, sepia, sponges, starfishs, worms, and zoobenthos. This wide range of prey species demonstrates the Amblyraja radiata‘s ability to adapt to different food sources in its varied habitats.
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