With a guppy you need to look at the gravid spot. This is a dark spot in the fish's belly. A large gravid spot indicates the fish is likely to be pregnant. You can tell how pregnant the fish is by how large the spot is. Sorry I have no experience with other species.
The female gets a deeper tummy and there is a dark (gravid) spot by her anal fin.
When you hold the fish it will say what kind its status(which will say pregnant) and age
the fish will have dots
The same amount of fish will be produced in a net as in a breeding trap. The amount of fish you save though could be different. That depends upon you and how much you know about rearing baby tropical fish.
What exactly is a fish coin?
Yes, the females will know when they are pregnant. Other females will know too if they are housed together. The males will know because the pregnant female will have nothing to do with the males if she is pregnant.
how do you know when ones pregnant?well, it useually takees the male to get the female pregnant about 2 weeks. You know when shes pregnant by getting bigger in the stomach and wiggleing in the stomach, and shes eating more
After a female has reached a certain age to have menstrual cycles, then they can have children.
Depends on the fish. Some lay eggs immediately during fertilization, so they aren't ever "pregnant". On livebearers like guppies, a swollen abdomen or enlarged gravity spot are the most common signs.
flowron
When their belly gets big.
you have sex and if you don't know what that means ask.