I am guessing that you are refering to the "Siamese Fighting fish" Better (more acurately) known as a Betta splendens. They do not have live young and so can not get pregnant. The male builds a nest of bubbles and looks after the eggs and fry in there until he decides they are capable of hiding and fending for themselves.
Technically, only live bearers can get "pregnant". All types of fish reproduce, and the most common way is by spawning.
You should name your Chinese fish Martha or in Chinese maratharatia!
A pregnant fish is called a TWIT
Parrot fish do not get pregnant so there is nothing to do.
When you hold the fish it will say what kind its status(which will say pregnant) and age
鱼yu
have sex with a fish and get it pregnant
a fat orange Chinese fish
the Chinese beta fighting fish
Although there are fish that live birth, goldfish are egg laying fish, and as such, they do not get pregnant.
so?
nothing![although, dont let the other fish eat the pregnant one]
Fish actually can not get pregnant. The female fish drops her unfertalized eggs in the water and a male fish swims past and fertilizes them.