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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]
Osteichthyes (/ ˌ ɒ s t iː ˈ ɪ k θ iː z / ost-ee-IK-theez; from Ancient Greek ὀστέον (ostéon) 'bone' and ἰχθύς (ikhthús) 'fish'), [2] also known as osteichthyans or commonly referred to as the bony fish, is a diverse superclass of vertebrate animals that have endoskeletons primarily composed of bone tissue.
The study of fish dates from the Upper Paleolithic Revolution (with the advent of "high culture"). The science of ichthyology was developed in several interconnecting epochs, each with various significant advancements. The study of fish receives its origins from humans' desire to feed, clothe, and equip themselves with useful implements.
List of aquarium fish by scientific name. 3 languages. ... This article lists fish commonly kept in aquariums and ponds. [1] Anguilliformes. Muraenidae.
Beloniformes / ˈ b ɛ l ə n ɪ m ɪ f ɔːr m iː z / is an order composed of six families (and about 264 species) of freshwater and marine ray-finned fish: . Adrianichthyidae (ricefish and medakas)
Leiognathus equula, [3] the common ponyfish is a species of marine ray-finned fish, a ponyfish from the family Leiognathidae. It occurs in brackish and marine waters from East Africa to Fiji in the Indian and western Pacific Oceans, Red Sea and Persian Gulf.
Pomacentridae is a family of ray-finned fish, comprising the damselfishes and clownfishes.This family were formerly placed in the order Perciformes but are now regarded as being incertae sedis in the subseries Ovalentaria in the clade Percomorpha. [2]
As generally benthic fish, blenniiformids spend much of their time on or near the sea floor; many are reclusive and may burrow in sandy substrates or inhabit crevices in reefs, the lower stretches of rivers, or even empty mollusc shells. Some blennies, otherwise known as "rock-hoppers", leap from the water onto rocks in order to reach other pools.