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Blacknose Dace
The blacknose dace is either of two ray-finned fish species: * Eastern blacknose dace, ''Rhinichthys atratulus'' * Western blacknose dace Western blacknose dace (''Rhinichthys obtusus'') is a common species of ray-finned fish belonging to the family Cyprinidae (minnow or carp) and the genus ''Rhinichthys ''Rhinichthys'', known as the riffle daces, is a genus of freshwater fish in ..., ''Rhinichthys obtusus'' {{Short pages monitor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ray-finned Fish
Actinopterygii (; ), members of which are known as ray-finned fishes, is a class of bony fish. They comprise over 50% of living vertebrate species. The ray-finned fishes are so called because their fins are webs of skin supported by bony or horny spines (rays), as opposed to the fleshy, lobed fins that characterize the class Sarcopterygii (lobe-finned fish). These actinopterygian fin rays attach directly to the proximal or basal skeletal elements, the radials, which represent the link or connection between these fins and the internal skeleton (e.g., pelvic and pectoral girdles). By species count, actinopterygians dominate the vertebrates, and they constitute nearly 99% of the over 30,000 species of fish. They are ubiquitous throughout freshwater and marine environments from the deep sea to the highest mountain streams. Extant species can range in size from '' Paedocypris'', at , to the massive ocean sunfish, at , and the long-bodied oarfish, at . The vast majority of Actino ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eastern Blacknose Dace
Eastern blacknose dace (''Rhinichthys atratulus'') is a species of ray-finned fish in the genus ''Rhinichthys''. Its name originates from the Old French word "dars" which is the nominative form of the word "dart" in reference to their swimming pattern. The western blacknose dace (''Rhinichthys obtusus'') formerly was considered conspecific. While morphologically the two species are not significantly different, they are allopatric. The eastern blacknose dace is found across the southeast portion of Canada and down along the United States' east coast. It is dark brown to olive on its dorsal surface and silvery white below, the two shades separated by the darkly pigmented lateral line. In the breeding season, males develop darker pigmentation and an orange lateral line. Blacknose dace live in rocky streams and rivers where they feed upon small invertebrates and microscopic biological matter and provide forage for larger fish. Physical description As a fry, this fish is 5 mm lon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
