Clownfish are a type of fish that can be found in the aquarium trade. They are often used as pets, but they can also be used in aquaponics systems to produce food. To delete clownfish from an aquarium, you will need to first determine their location. Clownfish live in small groups and will usually move around when they are not being watched. To find them, look for a group of fish that is swimming around or playing together and then look for the clownfish that is the most active. Once you have located them, you will need to take action to delete them from the aquarium. You can do this by using a plunger or a vacuum cleaner to suck out all of the water from their tanks and then put them back into their tanks without them.