Unfortunately today we discovered 6 large dead fish floating in the pond.

How can I dispose of them? In the compost or bury them around plants?

Bury them very very deep. Otherwise any dogs from miles around will find them
and roll on them, and their owners will hate you forever.
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)