Pseudocorynopoma doriae

Pseudocorynopoma doriae, or the dragonfin tetra, is a species of freshwater fish in the genus Pseudocorynopoma. It is native to inland waters in South America.

Description
Pseudocorynopoma doriae has an elongated, flattened body. The mouth is large, pointing upwards diagonally, with fine teeth. The eyes are large. The fins are large, with the exception of the pelvic fin. Both anal and dorsal fins when folded reach the root of the caudal plumage. The caudal fin is bilobate, with equal lobes. The basic coloration is brown with silvery reflections. Along the body runs a horizontal band, which, depending on the origin of the fish may be cream, white or bluish-silver. There is also another black line running from the base of the dorsal fin to the caudal fin. The gills and ventral area are white. The fins are yellow-orange in color, but at the same time almost transparent. Males have large pectoral, dorsal and anal fins, while females fins are of normal size. The maximum size of fish is 8 cm.

Environment
The rivers where this species is found have a pH range of 6.0 - 7.5. This is a tropical species, and the range temperature is around 20 °C - 24 °C. These fish stay at depths of up to 1 m, at low currents (estuaries, marshes, flooded areas, lagoons, streams, irrigation and drainage canals, and small watercourses). The fish always live close to the shore and vegetation, as they can find shelter from many predators there. These fish do not live in the channels of large rivers.

Diet
The dragonfin tetra is an omnivorous fish, feeding mainly on small invertebrates such as water fleas, ringworms, small shrimps, insect larvae, and flying insects. Zooplankton is also part of their diet. The fish also eat algae, soft plant leaves, and the eggs of other fish.