These are in the real world by the way, you can have them as pets but they might need to be treated from disease. House them in a 4x2 or around 10x10 foot tank depending on the size. They can grow up to 4 feet long so they need a decent amount of space. For substrates give them a black or dark same with smooth pebbles as well . For decoration you can add smooth rocks (spaced out) and aquatic plants. This is real by the way

-I's Aquatics