Plants look green because the green spectrum has a lot of energy, and to stop over heating and leaf burning and messing with the delicate photosynthesis, plants reflect or let green mostly pass through and only use about 20% of green soecturm energy, while mostly use all of red end and blue end.. At least that's what I heard on a science show.

You've got it partially backwards. The sky is blue because of Rayleigh scattering, but it doesn't reflect the ocean; the ocean is blue because it reflects the sky.

Incidentally, I've heard it said (I think it was xkcd) that we use the term "Rayleigh scattering" because it sounds silly to say that the air is blue (via the mechanism of Rayleigh scattering); so maybe that's part of it?

Plants are green because they absorb all other wavelengths of light. And bounce the green into your eye. In actual fact, color only exists in your brain as a way to understand the world around us. Our eyes are just sensors that detect light. And color is how we process it. We could have evolved into understanding it in different ways too, like smell. Therefore color doesnt even exist in the natural world. Green is just an illusion of our mind.

This is kinda away from the other replies to your comment. But I took that meme as saying plants get CO2 from the air (blue - scattering) and use sunlight (yellow - not really but meh) to produce many things with it, including chlorophyll which is the green pigment in plants.

Wow, wrong, Do some research, but I will help if needed (seriously, DM me or whatever) but why not do it publicly, You're asking the right questions and that counts for a lot.

Reflecting the ocean is not a thing, but rayleigh scattering is a real reason for blue sky.

Science rocks.