Léon Louis Vaillant was a French zoologist. He is most famous for his work in the areas of herpetology, malacology, and ichthyology.
The Panama ghost catshark is a lesser known catshark of the family Scyliorhinidae. This catshark is only found off Panama, between 9°N and 2°N. The reproduction of the Panama ghost shark is oviparous.
The longnose catshark is a catshark of the family Scyliorhinidae found in the eastern central Pacific from central and southern California and the Gulf of California, between latitudes 38° N and 23° N, at depths down to 1,890. Its length is up to 58 cm.
The cylindrical lanternshark or Carter Gilbert's lanternshark is a shark of the family Etmopteridae found along the Caribbean coast of Colombia in South America, at depths of between 285 and 355 m. Its maximum length is 21 cm.
The African lanternshark is a shark of the family Etmopteridae found in the eastern Atlantic between latitudes 12°N and 18°S, at depths between 300 and 1,000 m. Its length is up to 30 cm.
The Papuan epaulette shark, Hemiscyllium hallstromi, is a bamboo shark in the family Hemiscylliidae found around southern Papua New Guinea, between latitudes 7° S and 10° S, and longitude 144° E and 146° E. Its length is up to 75 cm.
Etmopterus burgessi, sometimes known as the broad-snout lanternshark, is a lanternshark of the family Etmopteridae in the order Squaliformes. It is found only around Taiwan.
Agonostomus telfairii, the fairy mullet, is a species of fish in the family Mugilidae, the mullets. It is known by the common name fairy mullet. It is native to the islands off the eastern coast of Africa, where it can be found in freshwater bodies and estuaries in Comoros, Madagascar, Mauritius, Mayotte, and Réunion. It returns to the sea to spawn.
Ambassis fontoynonti, commonly known as the dusky glass perch, is a species of fish in the family Ambassidae. It is endemic to rivers in eastern Madagascar. Its natural habitat is rivers. It is threatened by habitat loss. The specific name honours the pathologist Maurice Fontoynont (1869-1948) who was president of the Malagasy Academy.
Werner's catfish is a species of airbreathing catfish. It is found in Burundi and Tanzania. Its natural habitats are rivers and freshwater lakes. It is threatened by habitat loss. This species reaches a length of 23.0 cm SL.
Eleotris pellegrini is a species of fish in the family Eleotridae endemic to Madagascar where it can be found in mangrove swamps. This species can reach a length of 23 cm (9.1 in). The specific name honours the French ichthyologist Jacques Pellegrin (1873-1944), who discovered this species in 1933 but thought that it was Eleotris vittata.
Haplochromis gowersii is a species of cichlid endemic to Lake Victoria. This species can reach a length of 22.4 centimetres (8.8 in) SL. The specific name of this taxon honours the former Governor of Uganda William Frederick Gowers (1875-1954).
The Victoria stonebasher is a species of ray-finned fish in the family Mormyridae. It is found in Kenya, Rwanda, Tanzania, and Uganda. Its natural habitats are rivers, swamps, freshwater lakes, freshwater marshes, and inland deltas. It is threatened by habitat loss.
Oxylapia is a genus of freshwater fish in the family Cichlidae. It contains the single species Oxylapia polli, known locally as the songatana. It is an endangered species, endemic to the Marolambo Rapids in the Nosivolo River in east-central Madagascar. It is threatened by habitat loss and sedimentation caused by deforestation. The only other monotypic cichlid genus in Madagascar is Katria, and it is restricted to the same region as Oxylapia. In 2010, the Nosivolo River was designated as a Ramsar Site. The Oxylapia is the conservation flagship species for the district capital Marolambo.
Haplochromis degeni is a species of cichlid endemic to Lake Victoria. It is sometimes placed in the monotypic genus Platytaeniodus, but FishBase leaves it in Haplochromis pending a thorough review of that group. This species grows to a length of 15.4 centimetres (6.1 in) SL. The specific name honours the Swiss naturalist Edward Degen (1852-1922) who collected fishes, including the type of this species.
The Dharna barb is a species of ray-finned fish in the genus Puntius. It is endemic to India.
The Danube delta gudgeon was a species of cyprinid fish endemic to the lower Danube in Romania and the Ukraine. It was last recorded in the 1960s, with many studies conducted in its home range, all failing to find the species.
Squalidus wolterstorffi is a species of cyprinid fish endemic to southeastern China.
Crenicichla vaillanti is a species of cichlid native to South America. It is found in the Essequibo and Mana River basins. This species reaches a length of 12.6 cm (5.0 in).
Paraliparis vaillanti is a species of snailfish found in the Northwestern Atlantic Ocean primarily in the Laurentia Channel, between Newfoundland and Cape Breton.
