Urogymnus
Urogymnus is a genus of stingrays in the family Dasyatidae. Commonly known as fanrays, they are characterized by their broad, flat bodies, large pectoral fins that are fused to the head, and a whip-like tail with one or more venomous spines. Fanrays are found in tropical and subtropical waters around the world, typically inhabiting sandy bottoms and seagrass meadows. They are benthic feeders, using their broad pectoral fins to dig in the substrate and locate prey, which includes crustaceans, mollusks, and small fish.
Common Names
Fanrays are known by various common names, including:
- Fanray
- Fan skate
- Fantail ray
- Long-tailed ray
Characteristics
Fanrays are typically characterized by the following:
- Broad, flat body: Their body shape resembles a fan, with large pectoral fins that are fused to the head.
- Large pectoral fins: These fins are used for swimming and digging.
- Whip-like tail: The tail is long and thin, with one or more venomous spines located on the dorsal surface.
- Mouth on the ventral surface: The mouth is located on the underside of the body, surrounded by small papillae.
- Five gill slits: Fanrays have five gill slits located on the ventral surface of the body.
- Spiracles: They possess two spiracles located on the dorsal surface of the head, which are used to draw water over the gills.
Environment
Fanrays are found in tropical and subtropical waters around the world. They prefer sandy bottoms and seagrass meadows, where they can burrow and forage for food. Fanrays are typically found in depths of up to 100 meters.
References