WebAll Answers (4) Fin rays stiffen the fins to provide better stability for the fish. Also, fin rays may be moved individually by muscles, so undulating movements of the fins are possible. The ray ... WebFeb 15, 2024 · The group of ray-finned fishes (Class Actinopterygii) encompasses over 20,000 species of fish that have 'rays,' or spines, in their fins. This separates them from the lobe-finned fishes (Class Sarcopterygii, e.g., the l ungfish and coelacanth), which have fleshy fins. Ray-finned fishes make up about half of all known vertebrate species .
Osteichthyes - Wikipedia
Bony fishes form a taxonomic group called Osteichthyes (or Euteleostomi, which includes also land vertebrates). They have skeletons made of bone mostly, and can be contrasted with cartilaginous fishes (see below), which have skeletons made mainly of cartilage (except for their teeth, fin spines, and denticles). Bony fishes are divided into ray-finned and lobe-finned fish. Most living fish are r… WebWhat is the structure of fins in fish? Fins are anatomical elements that protrude from a fish's body and are made up of bony spines or rays. They are covered in skin and are attached in a webbed pattern, as seen in most bony fish, or a flipper-like pattern, as seen in sharks. 5. landmark at atwell
Introduction to the Actinopterygii - University of California …
WebMar 15, 2024 · Actinotrichia = Spines. Ceratotrichia = The fin rays of cartilaginous fish (inflexible, unbranched and unsegmented) Dorsal = Referring to the upper surface of the … WebActinopterygii. : More on Morphology. This mounted skeleton of the common perch shows several characteristics of ray-finned fish. As the name suggests, the fins are supported by … WebThe ray-finned anatomy of goldfish is a fascinating study in fish classification. Understanding its anatomy can help us understand the evolution of fish and their relationship to other organisms. In this article, ... hema clubs in california