WebBritannica Dictionary definition of FIN. [count] 1. : a thin flat part that sticks out from the body of a fish and is used in moving or guiding the fish through water. a fish with blue scales and spiny fins. a shark fin. 2. : a part on a machine (such as a car or airplane) that is shaped like a fish's fin. a car from the 1950s with fins on the ... WebFish are aquatic, craniate, gill -bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately …
finned - definition and meaning - Wordnik.com
WebThe earliest lobe-finned fish are found as fossils in the Lower Devonian, and by the end of this period all major lineages had appeared. These early lobe-fins were fast-swimmers with a heterocercal tail, meaning that the … WebJul 5, 2024 · July 5, 2024. Source: University of Konstanz. Summary: Many fish species evolved parts of their fins into sharp, spiny, needle-like elements -- called fin spines -- that function to protect the ... swscewd-home
Spiny-finned fish - Definition, Meaning & Synonyms
WebThe meaning of RAY-FINNED is having fins supported by bony or horny rays : acanthopterygian. How to use ray-finned in a sentence. ... Morays belong to a group … 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, … Webfrom The American Heritage® Dictionary of the English Language, 5th Edition. adjective Having a fin, fins, or finlike parts. Often used in combination. from The Century … texting how to text