Koi Fish – Lifespan: 25 to 200 years Koi fish are commonly kept in ponds, and they are known for their long lives. While most Koi fish live for 25–40 years, some have lived even longer too.

One of the best parts about having a pet is getting to be friends with some of the purest hearts out there- but unfortunately enough, one of the saddest parts about having a pet is how short their ...