2006-10-24 01:39:05 · 4 answers · asked by trendafilka 3 in Education & Reference ➔ Other - Education
A fish is a water-dwelling vertebrate with gills that doesn't change form, as amphibians do, throughout its life. Most are cold-blooded, though some (such as some species of tuna and shark) are warm-blooded. There are over 29,000 species of fish, making them the most diverse group of vertebrates. Taxonomically, fish are a paraphyletic group whose exact relationships are much debated; a common division is into the jawless fish (class Agnatha, 75 species including lampreys and hagfish), the cartilaginous fish (class Chondrichthyes, 800 species including sharks and rays), with the remainder classed as bony fish (class Osteichthyes).
2006-10-24 01:44:27 · answer #1 · answered by HUI F 2 · 1⤊ 0⤋
How Many Species Of Fish
2016-12-29 18:35:02 · answer #2 · answered by Anonymous · 0⤊ 0⤋
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How many species of fish are there estimated to be in the world’s oceans?
2015-08-18 23:02:16 · answer #3 · answered by Katrinka 1 · 0⤊ 0⤋
There are hundreds of unknown species of marine life. Maybe even thousands.
2006-10-24 01:42:50 · answer #4 · answered by ♥ Karen ♥ 4 · 0⤊ 0⤋
over a few thousand
2006-10-24 01:47:28 · answer #5 · answered by rives 6 · 0⤊ 0⤋
3 small medium and large
2006-10-24 01:40:52 · answer #6 · answered by prizelady88 4 · 1⤊ 1⤋