paragraph_text: There are more than 100 freshwater fish species, varying from the giant European catfish (in the Tagus International Natural Park) to some small and endemic species that live only in small lakes (along the western portion of country, for example). Some of these rare and specific species are highly endangered because of habitat loss, pollution and drought. Up-welling along the west coast of Portugal makes the sea extremely rich in nutrients and diverse species of marine fish; the Portuguese marine waters are one of the richest in the world. Marine fish species are more common, and include thousands of species, such as the sardine (Sardina pilchardus), tuna and Atlantic mackerel. Bioluminescent species are also well represented (including species in different colour spectrum and forms), like the glowing plankton that are possible to observe in some beaches.

paragraph_text: Pur River is a river in western India in Gujarat whose origin is Near Nagor village. Its basin has a maximum length of 40 km. The total catchment area of the basin is .

paragraph_text: The family Notopteridae contains ten species of osteoglossiform (bony-tongued) fishes, commonly known as featherbacks and knifefishes. These fishes live in freshwater or brackish environments in Africa, and South and Southeast Asia.

paragraph_text: Ay River (, ) is a river in Bashkortostan and Chelyabinsk Oblast in Russia, a left tributary of the Ufa River. The river is long, and its drainage basin covers . The Ay freezes up in late October or early November and remains icebound until mid-April. The cities of Zlatoust and Kusa are along the Ay River. Along the banks of the river, there are many steep cliff sides and caves. The current of the river has been used for hydroelectric power. It is also possible to fish for pike, bleak, and carp, to name a few species.

paragraph_text: The shallow waters of the Southeast Asian coral reefs have the highest levels of biodiversity for the world's marine ecosystems, where coral, fish and molluscs abound. According to Conservation International, marine surveys suggest that the marine life diversity in the Raja Ampat (Indonesia) is the highest recorded on Earth. Diversity is considerably greater than any other area sampled in the Coral Triangle composed of Indonesia, Philippines, and Papua New Guinea. The Coral Triangle is the heart of the world's coral reef biodiversity, the Verde Passage is dubbed by Conservation International as the world's "center of the center of marine shorefish biodiversity". The whale shark, the world's largest species of fish and 6 species of sea turtles can also be found in the South China Sea and the Pacific Ocean territories of the Philippines.

paragraph_text: The Iriri River () is a large tributary of the Xingu River in Brazil, in the state of Pará. It is long making it the 116th longest river in the world (with Krishna River, India) and the 15th longest in the Amazon basin. The headwaters are the traditional home of the Panará people.

paragraph_text: The Danube was once a long - standing frontier of the Roman Empire, and today flows through 10 countries, more than any other river in the world. Originating in Germany, the Danube flows southeast for 2,850 km (1,770 mi), passing through or touching the border of Austria, Slovakia, Hungary, Croatia, Serbia, Romania, Bulgaria, Moldova and Ukraine before draining into the Black Sea. Its drainage basin extends into nine more countries. The Danube river basin is home to fish species such as pike, zander, huchen, wels catfish, burbot and tench. It is also home to a large diversity of carp and sturgeon, as well as salmon and trout. A few species of euryhaline fish, such as European seabass, mullet, and eel, inhabit the Danube delta and the lower portion of the river.

paragraph_text: Jalaur River, also known as Jalaud River, is the second longest river in Panay island and the second largest by drainage basin, only Panay River in Capiz has the longest and the largest river system in Panay. Jalaur river ranked 17th largest river system in the Philippines in terms of drainage basin size. It has an estimated drainage area of and travels from its source to its mouth in the Guimaras Strait. It drains the eastern portion of the island and traverses through Passi City and the towns of Leganes, Zarraga, Dumangas, Barotac Nuevo, Pototan, Dingle, San Enrique, Duenas, and Calinog.

paragraph_text: The region is home to about 2.5 million insect species, tens of thousands of plants, and some 2,000 birds and mammals. To date, at least 40,000 plant species, 2,200 fishes, 1,294 birds, 427 mammals, 428 amphibians, and 378 reptiles have been scientifically classified in the region. One in five of all the bird species in the world live in the rainforests of the Amazon, and one in five of the fish species live in Amazonian rivers and streams. Scientists have described between 96,660 and 128,843 invertebrate species in Brazil alone.

paragraph_text: The informal term ``big cat ''is typically used to refer to any of the four largest (living) members of the entire Panthera genus. Among the five total species within the Panthera genus, these four are the only cats that are able to roar. In descending order of their maximum potential size, these four species are: tigers, lions, jaguars, and leopards, with the tiger (Panthera tigris) being the largest. A more liberal and expansive definition is sometimes used which may include the snow leopard, puma, clouded leopard, Sunda clouded leopard and / or cheetah, although these added species do not roar.

paragraph_text: The Orinoco River () is one of the longest rivers in South America at . Its drainage basin, sometimes known as the Orinoquia, covers , with 76.3 percent of it in Venezuela and the remainder in Colombia. It is the third largest river in the world by discharge volume of water. The Orinoco River and its tributaries are the major transportation system for eastern and interior Venezuela and the llanos of Colombia. The environment in the Orinoco's basin is extremely diverse; it hosts a wide variety of flora and fauna.

paragraph_text: The Burmese stone loach ("Balitora burmanica") is a species of ray-finned fish in the genus "Balitora". It occurs in the Irrawaddy, Salween, and Tenasserim basins in Burma, China, and Thailand. Its maximum length is TL.

paragraph_text: The greater scissortail ("Rasbora caudimaculata") is a species of ray-finned fish in the genus "Rasbora". It inhabits forest creeks in Malaysia, Indonesia and the lower Mekong basin.

paragraph_text: The Jordan River runs along the Jordan Rift Valley, from Mount Hermon through the Hulah Valley and the Sea of Galilee to the Dead Sea, the lowest point on the surface of the Earth. Further south is the Arabah, ending with the Gulf of Eilat, part of the Red Sea. Unique to Israel and the Sinai Peninsula are makhteshim, or erosion cirques. The largest makhtesh in the world is Ramon Crater in the Negev, which measures 40 by 8 kilometers (25 by 5 mi). A report on the environmental status of the Mediterranean basin states that Israel has the largest number of plant species per square meter of all the countries in the basin.

paragraph_text: Piracanjuba is a municipality in southeastern Goiás state, Brazil. It is a big producer of orchids, milk products, and soybeans. "Piracanjuba is also the name of a fish (Brycon orbignyanus) common to the waters of the Plata River basin."

paragraph_text: Montana is home to a diverse array of fauna that includes 14 amphibian, 90 fish, 117 mammal, 20 reptile and 427 bird species. Additionally, there are over 10,000 invertebrate species, including 180 mollusks and 30 crustaceans. Montana has the largest grizzly bear population in the lower 48 states. Montana hosts five federally endangered species–black-footed ferret, whooping crane, least tern, pallid sturgeon and white sturgeon and seven threatened species including the grizzly bear, Canadian lynx and bull trout. The Montana Department of Fish, Wildlife and Parks manages fishing and hunting seasons for at least 17 species of game fish including seven species of trout, walleye and smallmouth bass and at least 29 species of game birds and animals including ring-neck pheasant, grey partridge, elk, pronghorn antelope, mule deer, whitetail deer, gray wolf and bighorn sheep.

paragraph_text: The five largest river basins (by area), from largest to smallest, are the basins of the Amazon (7M km), the Congo (4M km), the Nile (3.4 M km), the Río de la Plata (3.2 M km), and the Mississippi (3M km). The three rivers that drain the most water, from most to least, are the Amazon, Ganga, and Congo rivers.

paragraph_text: The Chattahoochee River forms the southern half of the Alabama and Georgia border, as well as a portion of the Florida border. It is a tributary of the Apalachicola River, a relatively short river formed by the confluence of the Chattahoochee and Flint rivers and emptying from Florida into Apalachicola Bay in the Gulf of Mexico. The Chattahoochee River is about 430 miles (690 km) long. The Chattahoochee, Flint, and Apalachicola rivers together make up the Apalachicola -- Chattahoochee -- Flint River Basin (ACF River Basin). The Chattahoochee makes up the largest part of the ACF's drainage basin.

paragraph_text: Group Image Subgroup Estimated number of described species Vertebrates Fishes 32,900 Amphibians 7,302 Reptiles 10,038 Birds 10,425 Mammals 5,513 Total vertebrate species: 66,178 Invertebrates Insects 1,000,000 Molluscs 85,000 Crustaceans 47,000 Corals 2,000 Arachnids 102,248 Velvet worms 165 Horseshoe crabs Others 68,658 Total invertebrate species: 1,305,075 Total for all animal species: 1,371,253

paragraph_text: The Great Ruaha River is a river in south-central Tanzania that flows through the Usangu wetlands and the Ruaha National Park east into the Rufiji River. Its basin catchment area is . The population of the basin is mainly sustained by irrigation and water-related livelihoods such as fishing and livestock keeping.

Question: How many fish species live in the river that has the largest basin in the world?
Answer: 2,200