WebClass Actinopterygii (ray-finned fishes), in existence since the Early Devonian, is the largest class of fishes with about 26,900 living species. Actinopterygians comprise three evolutionary radiations: Chondrostei, holostean, and Teleostei. Ichthyologists emphasize the skeleton in classification, but studies also include head and body length, teeth, fin rays, … WebMar 31, 2024 · fish, any of approximately 34,000 species of vertebrate animals (phylum Chordata) found in the fresh and salt waters of the world. Living species range from the primitive jawless lampreys and hagfishes …
15 Types of Ocean Rays - Characteristics - DeepOceanFacts.com
WebStingray. Stingrays are a group of sea rays, which are cartilaginous fish related to sharks. They are classified in the suborder Myliobatoidei of the order Myliobatiformes and consist … Batoidea is a superorder of cartilaginous fishes, commonly known as rays. They and their close relatives, the sharks, comprise the subclass Elasmobranchii. Rays are the largest group of cartilaginous fishes, with well over 600 species in 26 families. Rays are distinguished by their flattened bodies, enlarged pectoral fins … See more Batoids are flat-bodied, and, like sharks, are cartilaginous fish, meaning they have a boneless skeleton made of a tough, elastic cartilage. Most batoids have five ventral slot-like body openings called gill slits that lead from the See more Most batoids have developed heavy, rounded teeth for crushing the shells of bottom-dwelling species such as snails, clams, oysters, crustaceans, and some fish, depending on the species. Manta rays feed on plankton. See more The classification of batoids is currently undergoing revision; however, molecular evidence refutes the hypothesis that skates and rays are derived sharks. Nelson's 2006 See more Batoids reproduce in a number of ways. As is characteristic of elasmobranchs, batoids undergo internal fertilization. Internal fertilization is advantageous to batoids as it … See more Most species live on the sea floor, in a variety of geographical regions – mainly in coastal waters, although some live in deep waters to at least … See more Batoids belong to the ancient lineage of cartilaginous fishes. Fossil denticles (tooth-like scales in the skin) resembling those of today's chondrichthyans date at least as far back as the Ordovician, with the oldest unambiguous fossils of cartilaginous fish dating from the middle See more According to a 2024 study in Nature, the number of oceanic sharks and rays has declined globally by 71% over the preceding 50 years, … See more crystal obrien obituary marshfield
Spiny and soft-rayed fin domains in acanthomorph fish are ... - PNAS
WebFeb 4, 2014 · Aggressive. General description. Rays are a large family of saltwater fish closely related to marine sharks. The ray fish’s skeleton is made up entirely of cartilage and it is characterized by its flattened body and large pectoral fins which are fused to its head. Rays also have elongated tails tipped with a sharp spine and when threatened ... Webmanta ray, also called devil ray, any of several genera of marine rays comprising the family Mobulidae (class Selachii). Flattened and wider than they are long, manta rays have fleshy enlarged pectoral fins that look like … WebOsteichthyes (/ ˌ ɒ s t iː ˈ ɪ k θ i. iː z /), commonly referred to as the bony fish, is a diverse superclass of vertebrates that have skeletons primarily composed of bone tissue.They can be contrasted with the … dxo testversion