How do you know if a goldfish are mating?

Answer 1

If your fish are going to mate, this will typically begin when the female is full of eggs. The male will chase her and poke his head against her side and belly in an attempt to get her to release eggs. If she does, the male will then release what is called milt in an attempt to fertilize the eggs.

Unless you have plenty of room to raise the fry, you can leave the eggs in the tank for a day as the fish will eat them, and any eggs remaining should be removed as unfertilized eggs will grow fungus.

If you have the room to raise the fry, then you need to remove as many eggs as you can to a small dish with tank water; there is no need to remove the goldfish from their tank.

Answer 2

You will see that she has lost her big bulge and provided your tank has some cover for them you will also see some babies hiding in the tank somewhere. If there is no cover provided then there is a good chance the guppy will eat her own young.

Answer 3

The females will usually get a black spot on their belly.

Answer 4

Look for rapid breathing, (possibly) clamped fins, hiding, (possibly) a lifted tail, and (Possibly) driving herself backwards constantly.