Crenicichla is a genus of cichlids native to South America commonly known as the pike cichlids. They are found in most tropical and subtropical freshwater habitats between the Andes and the Atlantic.
Apistogramma is a large genus of freshwater fish in the family Cichlidae native to South America, but also commonly kept in aquariums. They are dwarf cichlids that mostly feed on tiny animals and have breeding behaviors that vary depending on the exact species.
Teleocichla is a genus of fish in the family Cichlidae found in the Tapajós, Xingu, Tocantins and Jari River basins, which are part of the Amazon River Basin in Brazil. All species are rheophilic, and highly elongated in shape. They generally are smaller than 9 cm (3.5 in) in length, making them some of the smallest cichlids of the Americas. Only T. preta can grow larger, reaching about 12 cm (4.7 in). Since restricted to areas with fast currents, they are particularly vulnerable to the building of dams, and the Belo Monte Dam may cause the extinction of T. centisquama. Other species recognized as threatened by Brazil's Ministry of the Environment are T. cinderella, T. prionogenys and T. wajapi.
Sven Oscar Kullander is a Swedish biologist specialised in ichthyology. He primarily researches cichlids – notably the genus Apistogramma and the Cichlasoma-complex – and other tropical fresh water fishes. He also has been working with endangered fish species in Sweden.
The blue acara is a colorful freshwater fish in the cichlid family. This fish can be found in various freshwater habitats, ranging from standing water to flowing streams, in Venezuela and Trinidad. They can reach lengths of 16 cm (6.3 in). The scientific species name is indicative to its looks; pulcher meaning "beautiful" in Latin. The blue acara is a common cichlid sold in many aquarium stores, and is sometimes confused with the larger green terror.
Jacques Pellegrin was a French zoologist.
Crenicichla geayi, also known as the half-banded pike cichlid, is a species of cichlid native to South America. It is found in the Orinoco River basin and in the Portuguesa River basin. This species reaches a length of 18.4 cm (7.2 in).
Wallaciia heckeli is a species of cichlid native to South America. It is found in the Amazon River basin and in the Trombetas River close to Cachoeira Porteira, Brazil. This species reaches a length of 5.2 cm (2.0 in).
Crenicichla isbrueckeri is a species of cichlid native to South America. It is found in the Amazon River basin and in the Aripuanã River basin. This species reaches a length of 9.5 cm (3.7 in).
Crenicichla pellegrini is a species of cichlid native to South America. It is found in the Amazon River basin and in the Aripuanã River basin. This species reaches a length of 15.7 cm (6.2 in).
Crenicichla pydanielae is a species of cichlid native to South America. It is found in the Amazon River basin and in the Trombetas River drainage above Cachoeira Porteira, Brazil. This species reaches a length of 17.8 cm (7.0 in).
Wallaciia regani is a species of cichlid native to South America. It is found in the Amazon River basin and in the Trombetas River at Cachoeira Porteira, Brazil. This species reaches a length of 7.9 cm (3.1 in).
Crenicichla stocki is a species of cichlid native to South America. It is found in the Amazon River basin and in the Tocantins River basin. This species reaches a length of 25 cm (9.8 in).
Saxatilia sveni is a species of cichlid native to South America. It is found in the Orinoco River basin, in the Llanos of Venezuela and Colombia. This species reaches a length of 25 cm (9.8 in).
Crenicichla chicha is a species of cichlid native to South America. It is found in the Rio Papagaio, upper rio Tapajós basin, Mato Grosso, Brazil. This species reaches a length of 13.8 cm (5.4 in).
Crenicichla rosemariae is a species of cichlid native to South America. It is found in the upper Xingu River drainage; Suiá-Missu River, Amazon River basin in Brazil. This species reaches a length of 24.4 cm (9.6 in).
Crenicichla monicae is a species of cichlid native to South America. It is found in the lower Rio Uaupés and lower Rio Içana, tributaries of the upper Rio Negro in Brazil. This species reaches a length of 27.3 cm (10.7 in).
Crenicichla ploegi is a species of cichlid native to South America. It is found swimming in Brazil. This species reaches a length of 28 cm (11 in).
Bryconops sapezal is a small freshwater fish native to the Rio Tapajós basin of Brazil. It is one of the more recent additions to its genus, described in 2018, and has a name that means "covered in sapê", or thatching. This originates from the Sapezal municipality of Mato Grosso, Brazil, which is type locality of B. sapezal.
Wallaciia is a South American genus of cichlids from the tribe Geophagini. The genus was only erected in mid-2023 by four South American ichthyologists and their Swedish colleague Sven O. Kullander. It was named in honour of the British naturalist Alfred Russel Wallace, and is a near-tautonym of the chosen type species. Previously, the species placed in Wallaciia belonged to the genus Crenicichla and formed the Crenicichla wallacii species complex. The genus Wallaciia occurs in the Amazon Basin from the Rio Madeira to the Rio Tocantins, but is absent west of Santo Antônio do Içá or the mouth of the Río Putumayo into the Amazon. The genus is also found in the drainage basins of the Orinoco and the Essequibo.
