Sometimes, how the environment affects light and colour is more of a factor than what the fish are actually capable of seeing.
In this Episode Greg talks about how water, wind, time of day and other factors conspire to dull a fish's colour vision. He also talks about flash, and how it can be a long-distance attractant for fish.
View the show notes at https://doclures.com/lure-colour-underwater-light-greg-vinall/
