What fish besides koi can live outside?

Oh, what a lovely question! Besides koi, there are many other types of fish that can thrive in outdoor ponds, such as goldfish, mosquito fish, and even some species of catfish. Each fish has its own unique beauty and charm that can bring life and joy to your outdoor space. Just remember to provide them with a suitable environment and care, and they'll flourish like happy little swimmers in your pond.