Thats a tiger shovel nose they get 4-5 feet long at least and grow very fast these fish are not for every one thye eat alot and need very large tanks or a pond
You may be able to get a pool for around $100 but filtration and water changes for it will cost ALOT more if you live in texas you could keep the pond out side but for people like me that live further up north keeping a pond out side isn't really an option it would cost thousands to keep a pond warm enough in NY or even around here in colorado so the pond would need to be kept in doors
What size tank do you have it in