Among the most difficult to save are those that live in water. David and Jane Pierce have owned — and loved — these koi fish for 25 years.Credit...Stella Kalinina for The New York Times ...

Anything strike you as special about this fish here? Well, it's worth 1.8 million dollars. It won grand champion at the All Japan Koi Show in 2017, and is the most expensive koi fish ever sold.

Koi fish have got a lot going for them ... is as unstressed as possible by keeping its environment uncrowded and free of parasites and toxic chemicals. Love the loyalty of a pup but just ...