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The male can be left with the eggs until they hatch. The eggs hatch in 1–2 days and remain in the nest for a further 2–3 days absorbing their yolk sac. The free-swimming fry are tiny and require microscopic infusoria until they are large enough to accept newly hatched brine shrimp or dry food. The water in the tank should be kept very clean ...
Male gouramis are known to be very aggressive; they may also be fin nippers and generally may bother other fish in the tank. They often show aggression toward species with long, flowing fins such as male guppies, goldfish, and bettas, because they display long tails and bright colors, presenting competition for impressing a female gourami ...
Initial development is rapid: the eggs hatch after one day, and the fry are free-swimming two days thereafter. The kissing gourami does not care for its young. [2] Adults migrate through the rivers to shallow lagoons or into flooded forests to spawn. A female starts mating and the male simultaneously shed the eggs and sperm to the outside.
A tank that includes paradise fish should be at least 20 US gallons (76 L; 17 imp gal) in size for a single male or 20–30 US gallons (76–114 L; 17–25 imp gal) for a community tank. The tank should be well planted [3] and covered; bogwood and rockwork may be included. Paradise fish tankmates must be chosen with care.
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All living species show parental care until fry are free swimming: some are mouthbrooders, like the Krabi mouth-brooding betta (Betta simplex), and others, like the Siamese fighting fish (Betta splendens), build bubble nests. Currently, about 133 species are recognised, placed in four subfamilies and about 15 genera.
Siamese fighting fish (sometimes Betta, esp. US) Betta splendens: 7.5 cm (3.0 in) Betta is the name of the genus that includes more than 60 species other than the Siamese fighting fish. 5 gal [62] 72–82 °F (22–28 °C) [62] 6.5-7.5 [62] Emerald betta: Betta smaragdina: 7 cm (2.8 in) Spotfin betta: Betta macrostoma: 10 cm (3.9 in) Frail ...
Male and female king bettas flare or puff out their gills in order to appear more impressive, either to intimidate rivals or attract mates, as well as when they’re startled. Females often flare their gills at other females (rare in B. splendens.) All bettas require a place to hide occasionally, even in solitary tanks.