Tropical fish are wonderful animals that inhabit tropical environments around the world. They stand out for their bright colors, and that makes them the most popular fish when it comes to creating an aquarium at home or anywhere else. Most of the tropical fish used to inhabit aquariums come from export centers or hatcheries.

Fish can reproduce in different ways: the oviparous, which expel the eggs and then the fry grows in the external environment; the ovoviviparous, where the fries also hatch from eggs but remain inside the mother until they hatch; and the viviparous, which are the animals that simply give birth to their fries after they have developed well within their organism. Most tropical fish tend to be ovoviviparous orviviparouswhich, after they are born, immediately swim free and independent from their parents.

In order for fish to have a normal life cycle and carry out their natural process, one of the factors that most influences is the temperature of the water in which they live. They can easily subsist in ecosystems that hover around 21-29 degrees Celsius, with an ideal temperature of 25 degrees Celsius. It will also depend on the species and the habitats each one comes from.

A unique characteristic of fish is that there is no single model of reproduction, on the contrary, there is an immense variability, and it is highly influenced by the environment they inhabit. That is why, in natural habitats that fits them sexually,fish are able to identify the right places and the best time to reproduce. So, the act itself of reproduction occurs in spaces with optimal conditions of temperature, oxygen, pH and currents. And this will also affect directly the gestation times.

Reproduction also involves various physiological factors that are physically controlled by the pineal gland, the hypothalamus, the pituitary gland, the liver and the gonads. The time of development of this whole process within the same gestation period of tropical fish varies according to the species and the environment itself.

Mainly, for breeding to occur, it is vital to have a male and at least three females in the habitat. Comparing some species of tropical fish, we find that for the Platys, after the male fecundates the female, they take 30 to 40 days to give birth and can have between 20 and 300 fingerlings. While the species Molly varies its gestation period from 4 to 7 weeks andthe Xipho breed between 4 to 6 weeks, depending on the temperature (the higher the temperature, the shorter the gestation period). And the Velifers can have a gestation period of 8 to 10 weeks.

Something curious about these fish is that the female is able to store packages of sperm after a single fecundation. So, after a while, a female can be pregnant without needing a male around. In conclusion, the tropical fish can be pregnant for about 4 to 10 weeks on average, depending on the species.

Tropical fishes are animals that anyone who loves having aquariums must to have in there. Is good for these people to know that tropical fishes are easy to maintain, and there are several guides on how to take care of them depending on the species.