Opisthonema
Encyclopedia
Opisthonema, the thread herrings, is a genus of herring
found in tropical waters of the Western Hemisphere
. They get their name from a filamentous nature of the last ray of the dorsal fin
. There are currently five members of this genus.
Herring
Herring is an oily fish of the genus Clupea, found in the shallow, temperate waters of the North Pacific and the North Atlantic oceans, including the Baltic Sea. Three species of Clupea are recognized. The main taxa, the Atlantic herring and the Pacific herring may each be divided into subspecies...
found in tropical waters of the Western Hemisphere
Western Hemisphere
The Western Hemisphere or western hemisphere is mainly used as a geographical term for the half of the Earth that lies west of the Prime Meridian and east of the Antimeridian , the other half being called the Eastern Hemisphere.In this sense, the western hemisphere consists of the western portions...
. They get their name from a filamentous nature of the last ray of the dorsal fin
Dorsal fin
A dorsal fin is a fin located on the backs of various unrelated marine and freshwater vertebrates, including most fishes, marine mammals , and the ichthyosaurs...
. There are currently five members of this genus.
Species
- Opisthonema berlangai Berry & Barrett, 1963 (Galapagos thread herring)
- Opisthonema bulleri (Regan, 1904) (Slender thread herring)
- Opisthonema libertate (Günther, 1867) (Pacific thread herring)
- Opisthonema medirastre Berry & Barrett, 1963 (Middling thread herring)
- Opisthonema oglinum (LesueurCharles Alexandre LesueurCharles Alexandre Lesueur was a French naturalist, artist and explorer.Pictured here is the oil portrait by Charles Willson Peale of Charles-Alexandre Lesueur...
, 1818) (Atlantic thread herring)