mould? lol
Black spots on a fishes body is a symptom of black spot disease( a disease caused by a digenetic fluke. It will usually go away on its own, as the complex life cycle of the fluke can not be completed in an aquarium.
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.
If you are referring to spots underneath their fur, and just on the skin, then yes, certain breeds of boxer dogs have spots.
That depends on what the black spots are.
dark yellow with black spots
To properly care for black snails in an aquarium, ensure they have a suitable environment with clean water, appropriate temperature, and hiding spots. Feed them a balanced diet of vegetables and algae, and monitor water quality regularly. Avoid overfeeding and keep the tank clean to prevent health issues.
Often, volcanoes.
A black Jaguars spots are so hard to see because the spots are also black so they blend into the fur.
A Dalmatian has black spots and white skin
those black spots are black heads caused from to much oil in the ears
spots
black spots