The brighter the fish, the bigger the price tag. Today there are about 120 varieties. To compare, there are about 200 breeds of dogs. But when it comes down to it, breeding koi is a lot harder.

The Mahoning Soil and Water Conservation District (SWCD) is now accepting orders for its spring fish sale for anyone looking ...

Koi keepers are willing to pay premium prices for fish with vibrant color patterns, with many keepers competing in competitions across the country to showcase their fish collection. The most ...

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 ...