To better understand this threat, we evaluated the capture and handling stress in three incidentally captured benthopelagic ray species: American cownose ray ( Rhinoptera bonasus ), Brazilian cownose ray ( Rhinoptera brasiliensis ), spotted eagle ray ( Aetobatus narinari ), and one benthic species, the longnose stingray ( Hypanus guttatus ). Cownose Ray Rhinoptera bonasus Cownose rays are easy to tell from other rays because their foreheads project over their deeply notched snouts. The International Union for Conservation of Nature says that Oman cownose rays are considered “regionally endangered”, in part due to overfishing. Unfortunately, there are many species of rays and skates that are considered threatened and endangered. Appearance. Like other rays, cownose rays have platelike teeth with which they grind up their food. Cownose rays are related to sharks and skates. This cownose ray at the Virginia Aquarium is feeding on an oyster. This species is a foraging predator that specializes on shelled, invertebrate prey including clams, snails, lobsters, oysters and crabs. Cownose rays can swim in schools so large that they strip the ocean bottoms bare in … Facts Summary: The Golden Cownose Ray (Rhinoptera steindachneri) is a species of concern belonging in the species group "fishes" and found in the following area(s): Colombia, Costa Rica, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Peru.This species is also known by the following name(s): Hawkray, Pacific Cownose Ray. Cownose rays get their name from their unique forehead, which resembles the nose of a cow. Because manta rays (genus Mobula) are exceptionally challenging to sample, and many mobulids are listed as vulnerable or endangered (Couturier et al., 2012), we focused our efforts on a representative of their sister taxon: cownose rays of the genus Rhinoptera, which exhibit a similar body plan, including paired cephalic lobes. Even though they can be found in groups of thousands of rays at a time, they are considered near threatened due to over-fishing. One example, the common skate (Dipturus batis) is now considered critically endangered by the World Conservation Union (IUCN).In fact, the IUCN Red List includes 547 species of elasmobranchs of which at least 20% are in danger of extinction. A new study shows that cownose rays return to the Chesapeake Bay when it’s time to mate. Endangered; Whereas there have been no assessments of East coast cownose ray population status (Courtesy SERC) ... Ogburn said that overfishing could push them into endangered status. These rays suck snails, oysters, crabs and other shellfish from the bottom of shallow mud and sand flats. In addition, we are developing resources that will streamline future genomics and CKMR work in cownose rays and other closely-related species of conservation concern, such as eagle rays and mobula rays. 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