Goldfish do not get pregnant. They are egg layers. Black spots on goldfish have nothing to do with their breeding condition.
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The Betta fish may have a fungus disease if there are small black spots on the back. It could also just be aging spots that some Betta fish get. You can purchase BettaFix at any pet store and add it to water to see if that helps.
It's regalar to have that on a gold fish
Black moors are a variety of goldfish which are egg layers so they can't get pregnant.
Betta fish develop black spots on their bodies due to a genetic condition called melanism, which causes an increase in the production of melanin, the pigment responsible for dark coloration in animals.
Black spots on betta fish can be caused by various factors such as stress, poor water quality, or a bacterial or fungal infection. To treat black spots on betta fish, it is important to first identify and address the underlying cause. This may involve improving water quality, reducing stressors in the fish's environment, and using medications specifically designed to treat bacterial or fungal infections. Consulting a veterinarian or experienced fish keeper for proper diagnosis and treatment is recommended.
White spots on a black moor goldfish could be caused by a parasitic infection called ich, which is common in aquarium fish. It is important to treat the fish promptly to prevent further spread of the infection.
Possible causes of black spots on a betta fish include stress, poor water quality, and certain diseases. Treatments may include improving water conditions, reducing stressors, and using medications as prescribed by a veterinarian specializing in fish health.
it will have a red dot and black on its belly and will be fat
It is a form of cancer. It isn't really known how fish get it.
Look at "why has my fish got white spots?"
Common signs of pregnant fish behavior include a swollen abdomen, changes in eating habits, increased aggression or territorial behavior, and seeking out hiding spots. Pregnant fish may also exhibit slower movements and spend more time resting near the bottom of the tank.