The primary reason your fish are gone in Fishdom is usually due to accidental relocation to another aquarium. Sometimes, players move their fish without realizing it. To find them, check all your tanks carefully. They might be hiding or simply in a different location.
It’s common for fish to get moved when decorating or reorganizing your tanks. This can happen quite easily, especially if you have multiple tanks. Make sure to look through each one to ensure your fish are not missing.
Another possibility is that your fish might be hidden behind decorations or plants. Sometimes, they like to hide, making it seem like they have disappeared. Check behind objects in your tank to spot them.
Don’t worry too much if you can’t find your fish right away. Take your time to search each tank thoroughly. Most likely, your fish are still there, just in a different spot or hidden from view.