fish Kuro

Kuro or Kurau is the common name for a group of fish that belong to the tribe Polynemidae. Spread in tropical to temperate waters, generally these fish and the usual silvery swarm. Kuro types can be found that when the tide but not too high, and usually in fairly clear water conditions.

Consists of eight genera and about 38 species, the types include Senangin (Eleutheronema tetradactylum), senohong (Leptomelanosoma indicum), sumbal (Polydactylus plebeius), and many more. Kuro is an important fishing catch fish, as well as popular as fish bait. British Dalambahasa fish is known as the Threadfin.

Scientific classification
Kingdom      :  Animalia
Phylum         :  Chordata
Subfilum       :  Vertebrates
Class            :  Actinopterygii
Order           :  Perciformes
Species        :  Eleutheronema tetradactylum
Family          :  Polynemidae

Introduction 

Kuro generally similar blunt elongated torpedo, with a gray color with 3-7 pieces of filaments in the pectoral fins, with the type of mouth inferior, under the muzzle. Dorsal fin with fingers loud (thorn) is located in the front, apart from the dorsal fin soft radius on the back. Menggarpu the tail fin, sign these fish are fast and agile swimmers. Typical chest fins, is divided into two parts, the upper form of ordinary, normal as the pectoral fins of fish in general. But the bottom fragmented into 3-7 pieces similar long tassels short whip. At the tassels Polynemus even numbered up to 15 strands, and padaikan beard (Polynemus dubious) three strands of which extends beyond the tail.

From the typical fringe designation arises threadfin in English and the name of his tribe, Polynemidae, taken from the language Gerika poly meaning 'many' and NEMA meaning 'thread'. Through the tassels also, kuro distinguished from other fish of similar such as relatives mullet (Mugilidae tribe) and relatives of milkfish (tribe Chanidae). Fish that size medium to large. Body length varies from about 20 centimeters (7.9 in) in fin-kuro black (Polydactylus nigripinnis) to reach 200 centimeters (79 in) in senangin and giant African kuro (Polydactylus quadrifilis).

Habitat and Habits

Kuro often visit shallow open water, with a sandy bottom, mud or clay, rarely wandering around coral reefs. Coverage area Spread in bottom waters of coastal waters with mud and sandy mud. Tassels chest fins rather useful in finding prey dwells in silt or fine sand. Is eurihalin, kuro can tolerate a range of salinity (salt content) wide that allows these fish venture into estuaries and even into the river. Kuro mainly prey on crustaceans and fish are smaller.

Kuro is expected to spawn at sea, allowing thousands of eggs are gently floating in the sea, keep abreast of current and wave until it is time to hatch.