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This fish also occurs in estuaries. largest freshwater pufferfish, they are very peaceful with most fish except, other Mbu pufferfish, other fish that will harass them. see above [82] Congo pufferfish: Tetraodon miurus: 15 cm (5.9 in) As it is an ambush pufferfish it is best to house it alone as it will attack tank mates. See above. [83]
Colomesus asellus is unusual among freshwater pufferfish for being migratory [12] and non-territorial. [ 1 ] Colomesus asellus is known to breed during the wet season, spawning in rivers, with the numerous small eggs being scattered on the substrate and the larvae drifting downstream.
Copella arnoldi, commonly known as the splash tetra or the splashing tetra, is a species of tropical freshwater fish belonging to the family Lebiasinidae. [ 1 ] [ 2 ] It is native to South America. The fish is named in honor of German aquarist Johann Paul Arnold (1869–1952), who collected the type specimen.
Asineops (Greek for "donkey-faced") [1] is an enigmatic genus of extinct freshwater ray-finned fish from the Eocene. It is the only member of the family Asineopidae and contains a single species, A. squamifrons, from the famous Green River Formation of Colorado, Wyoming, and Utah. It was described by Edward Drinker Cope in 1870. [2]
It is mainly a freshwater fish and thrives best in areas with weak water flow. [2] However, it is extremely adaptable and can thrive in a multitude of altered environments. [ 2 ] For example, although it prefers temperatures between 16 and 22 °C (61–72 °F), it can survive up to 30 °C (86 °F) [ 3 ] and down to 5 °C (41 °F). [ 2 ]
Young rudd eat zooplankton, aquatic insects, and occasionally other small fish. Mature rudd, which are about 18" in length and weigh about 3 pounds, eat mostly aquatic vegetation. The rudd can consume up to 40% of their body weight in vegetation per day, as much as 80% of which is discharged as waste, releasing nutrients into the water column.