What types of big fish are suitable for aquariums?

There are several types of big fish that are suitable for aquariums, depending on the size of the tank and the conditions they require. Some examples include:
Angelfish: These graceful and elegant fish can grow up to 6 inches long and require a minimum of 20 gallons of water per fish.
Discus: These colorful fish are known for their round body shape and require a minimum of 50 gallons of water per fish.
Oscar: These large and intelligent fish can grow up to 16 inches long and require a minimum of 75 gallons of water per fish.
Arowana: These majestic fish can grow up to 36 inches long and require a minimum of 250 gallons of water per fish.
Plecostomus: These bottom-dwelling fish are known for their ability to clean algae off of tank surfaces and can grow up to 24 inches long. They require a minimum of 100 gallons of water per fish.
Pacu: These close relatives of piranhas can grow up to 30 inches long and require a minimum of 250 gallons of water per fish.
It's important to research the specific needs of each type of big fish before adding them to your aquarium, as their diet, water conditions, and tank size requirements can vary greatly.
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