What causes colors in the ocean?
The crew had long arguments about this that were thankfully broken up by the sighting of a shark.
I thought that silt runoff from rivers allowed greater plant diversity, and therefore more yellow tint (blue plus yellow =green)
R thought that the color was a result of pollution.
C brought in that the gulf stream acts as a barrier, and water on the inland side is of different temperatures, and supports plant and microbrial life.
J&B had ideas but were too smart to get involved.