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A neon tetra can appear slightly plump in the belly due to having overeaten. Neon tetras need dim lighting, a DH less than one, about 5.5 pH, and a temperature of 75 °F (24 °C) to breed. There also needs to be a lot of tannins in the water. Neon tetras are old enough to breed at 12 weeks. [23]
For breeding, these tetras need water similar to the waters in which they live in the wild; extremely soft water with a pH of about 6 and a temperature of around 77 °F (25 °C). Ideally, the water should be highly stained by the tannins from peat, [3] in subdued light, shaded by plants. It spawns in a school, although in the actual act of ...
Black neon tetras are kept in soft acidic water, although captive-bread they can often survive in mature tap water with a range of 5.5 - 7.5. [ 7 ] [ 5 ] [ 6 ] Aquarists recommend that the water be kept clean at all times; that the tank contain live plants, a darker substrate and open water for swimming; and that the fish be kept in groups of ...
Humans inhabit hot climates, both dry and humid, and have done so for millions of years. Selective use of clothing and technological inventions such as air conditioning allows humans to live in hot climates. One example is the Chaamba, who live in the Sahara Desert. They wear clothing that traps air in between skin and the clothes, preventing ...
The surface and cave forms of the Mexican tetra have proven powerful subjects for scientists studying evolution. [28] When the surface-dwelling ancestors of current cave populations entered the subterranean environment, the change in ecological conditions rendered their phenotype—which included many biological functions dependent on the presence of light—subject to natural selection and ...
[6] [13] In common with numerous other tetras, these fishes are particularly fond of live bloodworms (these are the aquatic larvae of a midge belonging to the genus Chironomus) and will also devour live Daphnia avidly. Unlike those tetra species which adapt to surface feeding in the aquarium, rummy-nose tetras are not considered likely to add ...
The emperor tetra is a placid aquarium fish and will be disturbed by more boisterous species. It grows to 4.2 cm. [3] It prefers a pH of 6.5, a hardness of 3–6 dKH and a temperature of 23–27 °C. It does not school as readily as most tetras, and a pair appears happier than with most tetras.
They are organisms that live around sea level and can survive around the same temperatures as humans. Extremophiles are organisms that grow best in extremely cold, acidic, basic or hot environments. P. fumarii is a hyperthermophile, indicating that this organism grows best at extremely high temperatures (70–125 °C).