Can you place an Oscar in with yellow tang?

It is generally not advisable to place an Oscar fish with yellow tangs. Oscars are aggressive Freshwater Fish, while yellow tangs are peaceful Saltwater Fish, making them incompatible in terms of habitat and temperament. Mixing different species from different environments can lead to stress and aggression, ultimately harming the fish. It's best to keep them in their respective environments for their health and well-being.