What will happen to a fish if you put milk on it?

Putting milk on a fish is not a good idea. Here's why:

* It's harmful to the fish: Milk is not a natural food source for fish and can actually be harmful. It can clog their gills and make it difficult for them to breathe.

* It can attract bacteria: Milk can spoil quickly and attract bacteria, which can make the fish sick.

* It's not a solution for fish problems: If you notice a problem with your fish, like white spots or cloudy water, it's important to consult a veterinarian or a fish expert to find the right solution.

If you're concerned about the health of your fish, it's best to consult a professional.