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In a home setting, these fish need well-oxygenated water with a pH level of 6.8 – 7.2, optimal temperatures varying between 72 and 82 °F (22 and 28 °C), and plenty of aquatic plants to give them hiding places amid their school.
The rainbow shark (Epalzeorhynchos frenatum) is a species of Southeast Asian freshwater fish from the family Cyprinidae. [2] It is also known as the ruby shark, red-fin shark, red-finned shark, rainbow sharkminnow, green fringelip labeo, whitefin shark and whitetail sharkminnow. [3] [4] It is a popular, semi
It is native to freshwater swamps and demersal or thickly vegetated areas of flowing waters, in tropical northern Australia and New Guinea. [1] It grows up to 5 cm (2.0 in) in length, but this does not include the Threadfin's long tail. Sexing is easy by examining fins: males have larger, gaudier finnage than females.
This is an accepted version of this page This is the latest accepted revision, reviewed on 17 February 2025. Fresh-water species of fish Rainbow trout Adult rainbow trout Conservation status Secure (NatureServe) Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Order: Salmoniformes Family: Salmonidae Genus: Oncorhynchus Species: O. mykiss ...
The rainbow darter (Etheostoma caeruleum) is a small species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is native to North America where it is found in small, fast-moving streams and small to medium-sized rivers.
Actinopterygii (/ ˌ æ k t ɪ n ɒ p t ə ˈ r ɪ dʒ i aɪ /; from Ancient Greek ἀκτίς (aktis) 'having rays' and πτέρυξ (ptérux) 'wing, fins'), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish [2] that comprise over 50% of living vertebrate species. [3]
The fins (excluding the caudal fin) are yellow with dark margins and orange or red markings. [4] As with other rainbowfishes, Murray River rainbowfish are colourful fish. Their sides are silvery-brown, and have a green or silver sheen. A blue stripe extends from the snout to the caudal fin. The other fins are yellow and marked with orange or red.
Ranging in length from 11 cm (4.5 in) in the dwarf threadfin (Parapolynemus verekeri) to 2 m (6.6 ft) in fourfinger threadfin (Eleutheronema tetradactylum) and giant African threadfin (Polydactylus quadrifilis), threadfins are both important to commercial fisheries as a food fish, and popular among anglers. Their habit of forming large schools ...
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