Young Live-bearers are fairly large at birth and their development is very advanced. They can swim right away, which is needed to avoid their enemies including their parents who give no natal care whatsoever.
[edit] Live-bearers
Common name Taxonomy Picture Size Tank Type Care Level Remarks
Guppies and mollies
Guppy ...
Always consider power filters unless you are raising fry, spawning live-bearers or killies in a "natural" setup, or need minimal flow (for spawning bubble-nest builders). MECHANICAL vs.
I mainly keep >live-bearers, and while they probably preferred the hard water from the >tap, they have not seemed to be too adversly affected by the soft water. >So.... what might I expect by adding CO2 to water treated with the >water-softener?
With live-bearers, the females eggs are fertilized internally by a male and fully formed fry are released into the water at the end of the pregnancy.
Guppies, Mollies, Platys and Other Live-Bearers: Purchase, Care, Feeding, Diseases, Behavior and a Special Section on Breeding
Mollies: Keeping & Breeding Them in Captivity ...
Shrunken bellies and crooked spines in live-bearers
Overweight fish that swell up (bacteria attack the liver causing unnatural fat metabolism)
Reproductive failure (females stop producing eggs, as the bacteria attack the ovaries) ...
I also have a red-tail black shark and eight live-bearers, none of which have received any grief from the barbs, but our two angel fish did. Don't mix barbs with fish with long fins such as the siamese fighting fish.
All are designed for optimum water flow and may be used for either live-bearers or egg-laying fish. You can also use them as isolation tanks for injured or aggressive adult fish who can't be with the rest of the community.
Characins are egg-scatterers and are not live-bearers. With few exceptions, they do not care for either the eggs or the offspring. Members of this family usually do best in semi-lit aquariums with soft, slightly acid water.
...
Live-bearers are highly developed on an evolutionary scale, and their adaption gives their live young an advantage over egg-laying species.
from somewhere on the coast of South America or the east coast of Central America to a wholesaler and then to our pet store. They don't travel very well and were abnormally dark in colour, obvioiusly stressed, but alive. These live-bearers are called ...
There are many of different ways to do this part. Use some creativity. I think that a mesh box used for breeding live-bearers works best if the mesh is very fine. You could construct this yourself with material and drinking straws.
 See also: Fish, Water, Aquarium, Color, Freshwater
  
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