Bill Nye goes underwater to talk about ocean ecosystems and the importance of organisms such as coral, plankton, and kelp. In Bill Nye the Science Guy: Ocean Life, the Science Guy takes a look at the small organisms of the sea, including plankton, kelp, and coral. Although many of these life forms are too small to be seen with the naked eye, their importance to larger organisms is enormous. Bill Nye goes down to the depths to investigate phytoplankton and zooplankton and their place in the ocean food chain. His special guest is marine biologist Karen Montano, who visits tide pools with a group of youngsters for a look at the "nurseries of the sea."