Dr. Ethelwynn Trewavas was an ichthyologist at the British Museum of Natural History. She was known for her work on the families Cichlidae and Sciaenidae. She worked with Charles Tate Regan, another ichthyologist and taxonomist.
Copadichromis is a genus of haplochromine cichlids endemic to Lake Malawi in Eastern Africa. Copadichromis are part of a group known as utaka and are popular with aquarists, as this genus is relatively peaceful in captivity compared to the mbuna.
Protomelas is a genus of haplochromine cichlids endemic to Lake Malawi in East Africa. The genus is part of the haplochromine tribe and have maternal mouthbrooding and sexual dimorphism typical of this group. Popular in the aquarium hobby, Protomelas species are sold under a variety of trade names.
Buccochromis is a genus of relatively large haplochromine cichlids endemic to Lake Malawi and the upper Shire River in East Africa.
Otopharynx is a genus of haplochromine cichlids endemic to Lake Malawi in Eastern Africa.
The haplochromine cichlids are a tribe of cichlids in subfamily Pseudocrenilabrinae called Haplochromini. This group includes the type genus (Haplochromis) plus a number of closely related genera such as Aulonocara, Astatotilapia, and Chilotilapia. They are endemic to eastern, southern and northern Africa, except for Astatotilapia flaviijosephi in the Middle East. A common name in a scientific context is East African cichlids – while they are not restricted to that region, they are the dominant Cichlidae there. This tribe was extensively studied by Ethelwynn Trewavas, who made major reviews in 1935 and 1989, at the beginning and at the end of her career in ichthyology. Even today, numerous new species are being described each year.
Dimidiochromis is a genus of haplochromine cichlids endemic to Lake Malawi in East Africa. All of its species are elongated in shape and predatory on smaller fishes.
Eclectochromis is a small genus of haplochromine cichlids endemic to Lake Malawi.
Nimbochromis livingstonii, Livingston's cichlid or (locally) kalingono, is a freshwater mouthbrooding cichlid native to Lake Malawi, an African Rift Lake. It is also found in the upper Shire River and Lake Malombe. They are found in inshore areas of the lake over sandy substrates.
Nimbochromis venustus, commonly called venustus hap or giraffe hap, is a Haplochromine cichlid endemid to Lake Malawi in Africa. It prefers the deeper regions of the lake where it hunts smaller juvenile cichlids with a specialised hunting technique. After spotting prey, it will partially submerge itself into the sand and lie motionless until the chosen fish comes within reach. it will then dart out of the sand and strike. It is related to Nimbochromis livingstonii. In the wild it is known to grow to 25 centimetres (9.8 in) TL though usually not exceeding a length of 22.5 centimetres (8.9 in) TL.
Nimbochromis polystigma is a species of cichlid endemic to Lake Malawi, in the Great Rift Valley system of Africa. This species prefers areas with rock/sand substrate or areas with plentiful vegetation. It can grow to a length of 23 centimetres (9.1 in) TL.
Rhamphochromis is a genus of East African haplochromine cichlids endemic to the Lake Malawi basin, also including Lake Malombe, Lake Chilingali, Chia Lagoon and upper Shire River. They mainly occur in offshore open waters, but a few species also near the coast. They are piscivores that typically feed on lake sardines and small utaka cichlids.
Hemitaeniochromis is a small genus of cichlid fishes endemic to Lake Malawi in east Africa. The genus is distinguished from other genera of Lake Malawi Haplochromini by details of its melanic color pattern and by its dentition. The color pattern includes (1) a midlateral horizontal stripe starting at least an eye length behind the operculum, this stripe broken into separate spots at least on its front half, more nearly continuous on its rear half, extending to the end of the caudal peduncle; (2) a second (supralateral) stripe above the midlateral one that is only on the front part of the flanks, and which is also at least partly broken into spots; (3) above this at the base of the dorsal fin are 4 or 5 dorsal midline spots. The dentition of the jaws is also distinctive in fish at least 10 centimetres in length ; the outer teeth are roughly conical with a single cusp and are spaced apart from each other by about the width of the tooth.
Parachromis friedrichsthalii, the Yellowjacket cichlid, is a species of cichlid native to Central America where it is found along the Atlantic Slope in Mexico, Belize, Honduras and Guatemala. This species grows to a length of 28 centimetres (11 in) SL. This species is popular with anglers as a gamefish and can also be found in the aquarium trade. The specific name honours the Austrian explorer, botanist and archaeologist Emanuel von Friedrichsthal (1809-1842), who sent many specimens to Vienna from Central America, including the type of this fish.
Mylochromis is a genus of haplochromine cichlids endemic to Lake Malawi in Eastern Africa.
Nimbochromis fuscotaeniatus is a species of cichlid endemic to Lake Malawi and Lake Malombe. Males of this species can reach a length of 25 centimetres (9.8 in) TL while the females grow to 20 centimetres (7.9 in) TL. It can also be found in the aquarium trade. It is an ambush predator and feeds on smaller cichlids. Females are smaller than males and a brownish color, while males are larger and blue in color. The species is a mouthbrooder that spawns readily in the aquarium.
Nyassachromis is a genus of haplochromine cichlids endemic to Lake Malawi. They are open-water mouthbrooders, an ecological niche known as utaka to locals.
The electric blue hap is a species of cichlid fish endemic to Lake Malawi. It prefers to live in caves and crevices in rocky substrates. This species can reach a length of 20 centimetres (7.9 in) TL. It can also be found in the aquarium trade.
Stigmatochromis is a small genus of haplochromine cichlids that are endemic to Lake Malawi in East Africa.
Trematocranus is a small genus of haplochromine cichlids endemic to Lake Malawi.
