system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why is the Atlantic Ocean in South Carolina dark green while it's clear blue in South Florida?

Is it a gradual change? Could anything be done to clear up the green water? Is it only a matter of time before its dark green in south Florida? Was it once clear blue up the entire east coast?
gpt
The little bitty plant life that makes the water appear green thrives better in cooler water.  The closer you get to the equator, the warmer the surface water is, so there's less of that plant life turning the water green near the surface which makes it appears clearer, especially in the shallower water near the shore.