What can you see in the ocean?

One can see, sea animals like zoo plankton are small that you can see them only with a microscope. Of course you can also see big fish swim through these waters, such as great white sharks, manta rays, and ocean sunfish.

What about different types of plants? Or corals maybe? I am also interested with plants but I was curious when it comes to aquatic

I will be posting more about plants later on. Thank you for your interest and giving the idea about corals.