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Fundulus auroguttatus, a non-annual North American killifish similar to Fundulus chrysotus known as a topminnow. A small number of species will shoal while most are territorial to varying degrees. Populations can be dense and territories can shift quickly, especially for species of the extreme shallows (a few centimetres of water).
Similar to closely related genera such as Anablepsoides, Cynodonichthys, Laimosemion and Melanorivulus, Atlantirivulus are non-annual killifish. [4] They are small fish, no more than 6.5 cm (2.6 in) in total length. [5] Compared to many species in the family, the colors of Atlantirivulus are relatively dull. [3]
[3] [4] [5] If the split into multiple genera is not recognized, Rivulus contains more than 150 non-annual killifish species found in fresh and brackish waters of the tropical and subtropical Americas, ranging from Argentina in south to Mexico in north, including the Caribbean region.
Nothobranchius rachovii, the bluefin notho, is a species of freshwater annual killifish from Mozambique. [2] It can grow up to 6 cm (2.4"). [ 3 ] It is popular among killifish enthusiasts, who raise them from eggs in aquaria.
Kryptolebias is a genus of killifish in the family Rivulidae mostly native to warm parts of South America but with one species (K. marmoratus) found north through the Caribbean region to the Gulf Coast states of the United States. They are small fish, up to 7.5 cm (3.0 in) in total length. [2] They are non-annual killifish. [3]
This annual killifish inhabits ephemeral pools in semi-arid areas with scarce and erratic precipitations and have adapted to the routine drying of their environment by evolving desiccation-resistant eggs that can remain dormant in the dry mud for one and maybe more years by entering into diapause.
These annual killifish are endemic to the Paraguay, Guaporé, Mamoré and São Francisco basins in Argentina, Bolivia, Brazil and Paraguay. [2] [3] They inhabit temporary waters, such as swamps or ponds, that typically are located in open habitats like grassland. Once the water disappears, the adults die, but the eggs that have been laid in the ...
These annual killifish are endemic to seasonal waters (like pools) in the Paraguay, Tocantins–Araguaia, Xingu and Mamoré–Grande basins in Bolivia, Brazil and Paraguay. [ 2 ] [ 3 ] [ 4 ] Each species generally has a small distribution and some are seriously threatened by habitat loss ; the entire known range of S. reticulatus is in the area ...
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