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Description: It is a member of the Sea catfishes family and is native to the Atlantic coast from La Plata basin to eastern Brazil in South America. In spring, adults migrate from the Atlantic and the estuary into freshwater tributaries like the lower Uruguay, Paraná Guazú, and Sauce rivers to spawn. It feeds on crustaceans, bivalves and other mollusks, worms, and small fish. It can reach a Maximum length of 120 cm ( 3.9 feet).

Description: t is a member of the Trahira family an is native to the Río de La Plata basin in South America. It inhabits shallow lakes (pampas lagoons), canals, and slow-moving rivers, preferring waters with soft, muddy bottoms and dense vegetation. It feeds on smaller fish, amphibians, and invertebrates. It can reach a maximum size of 60 cm (24 inches).

Description: It is a member of the Shads and Sardines family and is it is found fro Santos, Brazil to the mouth of La Plata in Argentina, South America. It is native to the Río de la Plata basin. It is a shallow-water species and is found in brackish and salt water. It is a schooling species and it feeds on Plankton. It can reach a maximum length of 35 cm (13.8 inches).

Description: It is a member of the Arowanas family and is native to the Negro River basin in South America. It is found in flooded forests, marginal areas, and backwaters with dense submerged roots and overhanging vegetation, which provide both shelter and ideal ambush points for hunting. It feeds primarily on insects, shrimp, fish and sometimes birds and small animals. It can reach a maximum length of 90 cm (3 feet).

Description: It is a member of the Long-whiskered catfishes family and is native to the La Plata and Blanco River basins in South America. It is found in rivers, mostly in turbid and deep waters with moderate current. It primarily eats smaller fish. It can reach a maximum length of 103 cm (3.4 feet).

Description: It is a member of the Headstanders family and is native to Paraguay River basin in South America. It inhabits medium to large rivers, streams, and lagoons. It is an is an omnivorous and feeds on small fruits, various seeds, small fish and crabs. It can reach a maximum length of 68.4 cm (about 27 inches).

Description: It is a member of the Brycon characins family and is native to the Paraguay River basin in South America. Its habitat consists of clear, well-oxygenated rivers and rapids with sand or pebble bottoms. It feeds on fruits, seeds, plant matter, arthropods (insects), snails and occasionally small animals. It can reach a maximum length of 56 cm (22 inches).

Description: It is a member of the Thorny catfishes family and is native to the Paraná River basin in South America. It is a bottom dweller and will feed on aquatic insects, mollusks and aquatic plant matter. It prefers soft, sandy bottoms, plenty of hiding spots (like wood), and moderate water flow. It can reach a maximum length of 50 cm (19.7 inches).

Description: It is a member of the Piranha and Pacus family and is native to the Paraguay-Paraná River basin in South America. It is found in rivers, creeks and lakes. It feeds on the fins and scales of other fish, as well as smaller fish, insects, and crustaceans. It is a solitary hunter. It can reach a maximum length of 27.1 cm (10.7 inches).

Description: It is a member of the Brycon characins family and is native to Paraíba do Sul River basin in Brazil, South America. It inhabits rivers and sometimes found in reservoirs. It is mostly a vegetarian feeding on leaves and fruit, with a few insects and small fishes. It can reach a maximum length of 36.9 cm (14.5 inches). It is considered an endangered species.

Description: It is a member of the Smallscale pike characins family and is native to the Paraguay, Paraná, Uruguay, La Plata, and Mamoré River basins in South America. It inhabits rivers and flood plains. It feeds on fish. It can reach a maximum length of 35.2 cm (13.9 inches).

Description: It is a member of the Spiny eels family and is native to Central and South America: Mexico to northern Argentina. It inhabits streams, ponds, canals, drains, rice fields, both clear and turbid water. It is nocturnal and a carnivore. It is a facultative air breather (can breathe water through gills but can switch to regular air). It can reach a maximum length of 150 cm (59 inches).

Description: t is a member of the Flannel-mouth characiforms family and is native to the Paraná-Paraguay and Paraíba do Sul River basins in South America. It prefers deep, muddy-bottomed rivers, floodplains, and shallow lagoons. It feeds on algae and organic sediment. It can reach a maximum length of 80 cm (31.5 inches). https://www.redbubble.com/shop/ap/180750351

Description: It is a member of the Temperate perches family and is native to Colhue Huapi lake, Chubut, Negro, Limay and Colorado-Desaguadero river systems in Argentina, South America. It is commonly found near the shoreline and shallow vegetated areas. It primarily feeds on small fish. It can reach a maximum size of 40 cm (15.7 inches).

Description: It is a member of the Headstanders family and is native to the Paraná, La Plata and São Francisco, Uruguay, Paraguay, Guaíba and Parnaíba River basins in South America. It feeds on aquatic plants, seeds, grains, fruits, crustaceans, and small invertebrates. It is found in medium-to-large rivers, often found in fast-flowing water, lakes, lagoons, and areas with dense vegetation or rocky substrates. It can reach a maximum length of 76 cm (29.2 inches).

Description: It is a member of the Long-whiskered catfish family and is native to Paraná-Paraguay River basins in South America. It prefers large rivers, river mouths, and reservoirs. It mainly feeds on fish. It can reach a maximum length of 140 cm (4.6 feet). It is considered a near threatened species.

Description: It is a member of the Drums or Croakers family and is native to Amazon, Orinoco, Paraná, Paraguay, and São Francisco River basins and rivers in South America. It inhabits large river systems, lakes, flooded areas and man-made reservoirs. It feeds mainly on small fish. It can reach a maximum length of 80 cm (31.5 inches).

Description: It is a member of the Long-whiskered catfishes family and is native to the São Francisco and Paraná River basins in South America. It inhabits diverse, large-river ecosystems, including flooded forests, channels and lakes. It feeds on fish. It can reach a maximum length of 182 cm ( 6 feet). It is a near threatened species.

Description: It is a member of the Trahira family and is native to Central and South America from Costa Rica to Argentina in most rivers basins. Its habitat is diverse from free flowing clear water streams to slow turbid waters, water courses, irrigation and drainage ditches, and ponds. It feeds on fish. It can reach a maximum length of 65 cm (25.6 inches).

Description: It is a member of the Piranhas and Pacus family and is native to the Guaporé River basin and the Paraná River basin, Argentina in South America. It inhabits streams, and floodplains, often in murky or blackwater, with a preference for slow-moving water, sand, pebble, or humus substrates.  It feeds on fish, fins, scales, crustaceans, insects, and worms. It can reach a maximum length of 26 cm (10.2 inches).

Description: It is a member of the Cichlids family and is native to the Paraná River basin, in the Paraguay River in Brazil and Paraguay, in the Paraná River drainage in Argentina and the middle Uruguay River drainage in Brazil, South America. It is a carnivorous, bottom-dwelling predator that feeds on small fish, crustaceans, and aquatic insects. It can reach a maximum length of 31 cm (12.2 inches).

Description: It is a member of the Driftwood catfishes family and is native to Argentina, Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Paraguay, Suriname,Venezuela and Uruguay in South America. It prefers rivers in overgrown backwaters where the current is not too strong. It feeds on fish and crustaceans. It can reach a maximum length of 64.8 cm (25.5 inches).

Description: It is a member of the Ghost Knifefishes family and is native to Venezuela to Paraguay, Paraná rivers and the Amazon Basin of Peru in South America. It resides in rapidly flowing waters of creeks with a sandy bottom. It is a micro-predator of insect larvae. It possesses a weakly discharging neurogenic electric organ and ampullary electro receptors that are distributed from head to tail. It can reach a maximum length of 50 cm (19.7 inches).

Description: It is a member of the River Stingray family and is native to the Paraná-Paraguay River basin in South America. It resides in marshy zones where it is frequently found partially hidden in the sandy bottom. It is a carnivorous bottom-feeder that eats small fish, crustaceans (like shrimp, crabs, mussels, cockles), aquatic worms (including earthworms, bloodworms), and mollusks. It can reach 40 cm wide in diameter ( 16 inches).

Description: It is a member of the Neotropical silversides family and can be found in southern Brazil, Argentina and Uruguay in South America. It inhabits river systems, including lakes and lagoons, sometimes forming landlocked populations.  It feeds on crustaceans like barnacle larvae and shrimp, along with insects, worms, mollusks and even smaller fish. It can reach a maximum length of 42 cm (16.5 inches).

Description: It is a member of the Brycon characins family and is native to the La Plata basin in South America. It prefers fast-flowing, clean water and is now mostly restricted to fragmented, preserved stretches of these rivers, often near riverine forests.  It feeds on a fruits, plants, and insects. It can reach a maximum length of 79.5 cm (31.3 inches). It is a critically endangered species.

Description: It is a member of the Long-whiskered Catfishes family. It is native to the Amazon, Orinoco River basins, Guyana, Suriname and Paraná Rivers in South America. It lives in schools near the surface of the water and is found over soft muddy bottoms. It feeds on debris and plankton. It can reach a maximum length of 57.5 cm (33.6 inches).

Description: It is a member of the Brycon characins family and is native to Paraná, Paraguay, and Uruguay River basins; Laguna dos Patos drainage, upper Chaparé and Mamoré River basin in Bolivia, South America. It thrives in fast-flowing, warm waters, particularly rocky areas, rapids, and confluence zones. It can reach a maximum length of 100.0 cm (3.3 feet) and a maximum published weight of 31.4 kg (69.2 pounds).

Description: It is a member of the Headstanders family and is native to the Paraguay River in South America. It is found in main river channels and floodplain areas.  It is a omnivore species that eats small fruits, seeds, small fish, crabs, and insects. It can reach a maximum length of 68.4 cm (26.9 inches).

Description: t is a member of the Piranhas and pacus family and is native to the Amazon and Paraguay-Paraná River basins in South America. It is usually found in small groups of up to 20 individuals which appear to have a definite range within a pond or a creek. It feeds mostly on fins and muscle portions of fishes and may scavenge on dead mammals. It can reach a maximum length of 34.5 cm (13.6 inches).

Description: It is a member of the Piranhas and pacus family and is native to Paraguay-Paraná River basin in South America. It inhabits rivers, lakes and flooded forests. It feeds on fallen fruits, nuts, seeds, and other plant matter but also consumes insects, crustaceans, mollusks and occasionally small fish. It can reach a maximum length of 40.5 cm (16 inches).

Description: The major fish species of this group belong either to the Carp or Catfish families. It also includes species such as the Snakeheads and diadromous (a word of Greek origin that means “running across”) species, that can live in both freshwater and saltwater, such as sharks and Barramundi.

Description: It is a member of the Carp family and is native to Afghanistan, Pakistan, India, Nepal, Bangladesh, Bhutan and Myanmar. It inhabits streams, pools and lakes. It is found in rapid streams with rocky bottoms. It is an Omnivorous, feeding on fish, zooplankton, larvae and plant matter. It can reach a maximum length of 275 cm (9 feet). It is an endangered species.

Description: It is a member of the Sea Catfishes family and is native to the Indo-West Pacific. It is found in marine, coastal waters, as well as in estuaries and river mouths. It feeds mainly on invertebrates and small fishes. It can reach a maximum length of 48.5 cm (19 inches). It is a member of the Sea Catfishes family and is native to the Indo-West Pacific. It is found in marine, coastal waters, as well as in estuaries and river mouths. It feeds mainly on invertebrates and small fishes. It can reach a maximum length of 48.5 cm (19 inches).

Description: It is a member of the Carp family and is native to Pakistan, India, Tibet and Nepal. Its habitat is mainly rocky, mountainous streams and lakes. It is found in rivers with swift currents. It is a bottom feeder that feeds on plants which are attached to rocks and stones and invertebrates. It can reach a maximum length of 70 cm (27.6 inches).

Description: It is a member of the Velvet catfishes family and is native to Afghanistan, Pakistan, India, Nepal, Bangladesh and Myanmar. It inhabits rivers and estuaries, preferably muddy to clear water and prefers backwater of quiet eddies. It feeds on insects, mollusks, shrimps and fishes. It can reach a maximum length of 150 cm (59 inches).