Dawkinsia filamentosa

Black spot cash, Dawkinsia filamentosa ( above, including Dawkinsia assimilis )

The black spot barbel ( Dawkinsia filamentosa, Syn: Puntius filamentosus ) is a freshwater fish of the carp family (Cyprinidae ). It occurs in the coastal plains of Kerala and Karnataka and Tamil Nadu in southern India. Reports of occurrence in Sri Lanka based on confusion with the similar and closely related Dawkinsia Sinhala.

Features

The black spot cash 15 up to 18 inches long. Your body is laterally flattened and elongated than that of most other barbs from the Puntius - relationship. ( Latin: " filamentosus " = thread-like ) characteristic of the males of the species, the thread-like extended front, split dorsal fin rays, which are the reason for the scientific name of the species are and in some cases up on the tail fin base can range. From the closely related species D. assimilis, the black spot cash differs by nearly terminal mouth, while that is inferior by D. assimilis. The black spot cash does not, rarely reaches a rudimentary Bartel couple's only 0.5 to 2.2 % of the standard length.

• Fins formula: Dorsal: 2/ 8; Anal: 2 /5; Pectoral: 1/14-15.
• Dandruff formula: MLR 18-20 1-3.

The coloring of the black spot cash changes with increasing age. Juveniles are yellowish with three horizontal stripes on the body sides, one below the dorsal fin, one above the anal fin and the third, narrow on the tail fin shaft. The fins are transparent. From a length of six inches, the drawing goes back to the body sides. Only by the transverse fascia above the anal fin remains a thick black spot, which led to the German name of the species. Maturity black spot barbel are silvery, silvery - green to yellowish, shimmering with incident light in a rainbow of colors. Your top is darker and olive. The dorsal fin is bright red, her fin rays violet. The forked caudal fin is reddish with white lace and black spots below the peaks. Your outer fin rays are dark brown. The other fins are slightly yellowish. During the spawning period the abdomen is reddish and the fish develop above the mouth a tuberculate.

Way of life

The black spot cash is found in clear rivers, estuaries, swamps, lakes and ponds of the plains. It tolerates slightly brackish water and is often very close to the sea along with typical brackish water fish found. It feeds on vegetable matter, among other things. Spawning females lay 300 to 500 eggs, which stick easily and stick in the plant maze. The larvae hatch after two days and free swimming after another two days.

System

The black spot cash originally belonged to the genus Puntius and was the eponymous nature of the eight kinds comprehensive P. filamentosus - species group, a group of closely related South Indian Puntius species. The group was now Dawkinsia as an independent form.