I am playing in a warm ocean biome and noticed that the water particles that show up while fishing are still the old dark blue color; they do not use the color of the rest of the water in the biome. This also happens in the swamp, and presumably everywhere else as well.
Comments 2
Moang doesn't, Mojang does though.
On a serious note though, I don't think they're even meant to have the same color as the water surrounding them. If it is intended how it is right now, feel free to post that as a suggestion on r/minecraftsuggestions.
Moang does not provide support for -PRE editions but they love to hear them