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Ophidiiform fish typically have slender bodies with small heads, and either smooth scales, or none at all. They have long dorsal fins, and an anal fin that is typically united with the caudal fin. The group includes pelagic, benthic, and even parasitic species, although all have a similar body form.
Meristics is an area of zoology and botany which relates to counting quantitative features of animals and plants, such as the number of fins or scales in fish.A meristic (countable trait) can be used to describe a particular species, or used to identify an unknown species.
The finescale dace (Chrosomus neogaeus) is a species of freshwater fish in the family Cyprinidae of order Cypriniformes.It is native to the northern portions of Minnesota, [3] with relatively smaller populations in northern New York, Vermont, New Hampshire (where C. neogaeus is found in only Connecticut and Androscoggin River drainages north of the White Mountains), and Maine.
The knifefish has approximately one hundred and fifty fin rays along its ribbon-fin. These individual fin rays can be curved nearly twice the maximum recorded curvature for ray-finned fish fin rays during locomotion. These fin rays are curved into the direction of motion, indicating that the knifefish has active control of the fin ray curvature ...
The tapetails are named for their caudal fins, which include a narrow streamer that may be longer than the fish's body. The genus Mirapinna, known as the hairyfish, lacks the streamer, but has multiple hair-like growths on its body. All mirapinnids lack scales and fin rays. Mirapinnids are all small fish, less than 7 cm (2.8 in) in length.
Acanthopterygii (meaning "spiny-finned one") is a superorder of bony fishes in the class Actinopterygii.Members of this superorder are sometimes called ray-finned fishes for the characteristic sharp, bony rays in their fins; however this name is often given to the class Actinopterygii as a whole.
Scales to be domed; Dorsal fin to be single, all other fins to be paired; Caudal fin to be divided and forked and held above the horizontal; Extremities of fins to have a slightly rounded appearance; Minimum length of body to be 5.5 cm (2¼ inches) The fish should be bright and alert and displaying well developed domed scales all over the body ...
The caudal fin is rounded or truncate with rounded corners. It has smooth scales which are largely covered by skin and auxiliary scales. There are 11 spines and 18-19 soft rays in the dorsal fin while the anal fin has 3 spines and 9-10 soft rays. [2] The colour of this fish is overall yellowish to reddish brown, becoming paler ventrally.