Search results
Results from the WOW.Com Content Network
Fishes are a paraphyletic group and for this reason, the class Pisces seen in older reference works is no longer used in formal taxonomy.Traditional classification divides fish into three extant classes (Agnatha, Chondrichthyes, and Osteichthyes), and with extinct forms sometimes classified within those groups, sometimes as their own classes: [1]
Class Chondrichthyes (cartilagineous fish - sharks and rays) Class Osteichthyes (bony fish), which has two subclasses: Actinopterygii (ray-finned fish) Sarcopterygii (lobe-finned fish) Full details of higher order fish taxonomy can be found in the Chordata article.
Download as PDF; Printable version; In other projects ... This is a list of fish families sorted alphabetically by scientific name. There are 525 families in the list.
List of aquarium fish by scientific name. ... Download as PDF; Printable version ... This article lists fish commonly kept in aquariums and ponds. [1] Anguilliformes ...
Ichthyology is the branch of zoology devoted to the study of fish, including bony fish (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish ().According to FishBase, 33,400 species of fish had been described as of October 2016, with approximately 250 new species described each year.
A fish (pl.: fish or fishes) is an aquatic, anamniotic, gill-bearing vertebrate animal with swimming fins and a hard skull, but lacking limbs with digits.Fish can be grouped into the more basal jawless fish and the more common jawed fish, the latter including all living cartilaginous and bony fish, as well as the extinct placoderms and acanthodians.
"The science of classification as applied to living organisms, including the study of means of formation of species, etc." [5] "The analysis of an organism's characteristics for the purpose of classification" [6] "Systematics studies phylogeny to provide a pattern that can be translated into the classification and names of the more inclusive ...
These fish have the ability to produce and analyze weak electric fields through a specialized organ, [40] (electric organ discharges), which Lissmann and coworkers first analyzed in 1958 through several experiments. [53] [54] Such electric fields provide these fish with a specialized sensory system for communication and orientation. [55]