The Zeiformes are a small order of marine ray-finned fishes most notable for the dories, a group of common food fish. The order consists of about 40 species in seven families, mostly deep-sea types. Zeiform bodies are usually thin and deep. Mouths are large, with distensible jaws, and there is no orbitosphenoid. Pelvic fins have 5-10 soft rays and...
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http://en.wikipedia.org/wiki/Zeiformes
(from the article `atheriniform`) ...family that includes the guppies, mollies, swordtails, and many other aquarium fishes. In addition to the Atheriniformes, this article treats the ... any member of the superorder Acanthopterygii, including four orders of marine and freshwater fishes having fins with some spiny (as opposed to soft) .....
Found on
http://www.britannica.com/eb/a-z/z/5
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