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It is normally observed in loose schools, but larger fish are more often recorded as pairs or individuals. It is a carnivorous species which preys on prawns and fish. The fish preyed upon are mainly grey mullets, anchovies and drums, and they sometimes feed on polychaetes. The ratio of crustaceans to fish fed on varies with the season.
A barb is one of various ray-finned fish species in a non-phylogenetic group, with members in the family Cyprinidae, and especially the genera Barbus and Puntius, but many others also. They were formerly united with the barbels in the subfamily Barbinae but that group is paraphyletic with the Cyprininae .
Cypriniformes / s ɪ ˈ p r ɪ n ɪ f ɔːr m iː z / is an order of ray-finned fish, which includes many families and genera of cyprinid (carps and their kin) fish, such as barbs, gobies, loaches, botias, and minnows (among others).
The snout is pointed and the small mouth is set far back on the lower side of the head with a short barbel underneath. There are 3 to 5 rows of sharp teeth in the upper jaw and 1 or 2 rows in the lower jaw. The eye is large and bulbous, giving the fish its alternative name of onion-eye grenadier.
In 2007, fishermen caught a specimen that was estimated to be between 90 and 115 years old. The fish weighed in at 62 pounds (28 kg) and was measured at 112 centimetres (44 in). It was caught south of the Pribilof Islands at an estimated depth of 2,100 feet (640 m). [12] [13] [14] [15]
B. barbus is native throughout northern and eastern Europe, ranging north and east from the Pyrénées and Alps to Lithuania, Russia and the northern Black Sea basin. [3] It is an adaptable fish which transplants well between waterways, and has become established as an introduced species in several countries including Scotland, [4] Morocco and Italy. [5]
Luciobarbus guiraonis is a ray-finned fish species in the family Cyprinidae. It is here placed in Luciobarbus following the IUCN, but that genus is very closely related to the other typical barbels and perhaps better considered a mere subgenus of Barbus. [2] [1] This large barbel is endemic to Spain, where it is known as barbo mediterraneo.
Siganus fuscescens is a schooling species and is a mostly diurnal fish. The juveniles have a diet dominated by filamentous algae while the adults prefer leafy algae and sea grass. [ 2 ] When they arrive on coral reef flats, the larvae aggregate in schools with a normal size of 200 individuals, but may hold as many as 5,000.