because he is getting old and is of the egde of death
Anywhere :)
The reputation of goldfish dying quickly is often due to poor care. The lifespan of goldfish in captivity can extend beyond 10 years.
Usually at the bottom of the tank in the rocks.
it would be could or have fin rot
Its Dieing .
It may just be getting used to the surroundings that you have put it in. Or if you have had it for a day or two it may need food or its bowl/tank cleaning out.
Regardless of the type or size of goldfish the minimum acceptable size of an aquarium for a goldfish is 30 gallons. Buy a tank that is at least 30 gallons if you plan to have goldfish. You can comfortably fit 3 goldfish in a tank this size but no goldfish in a tank any smaller. Goldfish are essentially pond fish and need lots of space to swim; they will not thrive in a small aquarium.
Goldfish are moderately inactive fish. They will spend much of their time just floating or sitting at the bottom.
That means your fish is ill
Because it is there instinct ! haha
Fish don't get pregnant. When a male and female goldfish mate, they will swim close together and then the female will release eggs which the male will then cover in a liquid from his own body. This means that the eggs are fertilized and then they will then sink to the bottom of the tank. I suggest putting some CLEAN marbles on the bottom of the tank with the eggs because this will stop the fish trying to eat their own eggs. This works.
What else would you expect them to swim in? Of course Goldfish swim in water.