Do they jump out of water and bite one's hand by any chance ?!
Then this is pirania-koi - you know, all them mutants - genetically modified food victims. LOL
Fantastic colours, Allen, and many thanks for sharing.
I can see it was a good day for them... The colors of the fish are so jazzy and the water looks cool and refreshing. One of the better koi fish images I've seen.
mary