We could look at seaweed, the kelps, all these different varieties of things that can be high in omega-3s, can be high in proteins, tremendously good things.
In temperate and polar climates, up to 40 meters below the surface, dense populations of giant kelp, the largest brown algae, grip the rocky seafloor with branching roots called holdfasts.
Brown algae are able to attach to the bare slippery surface because they have a strong root-like structure that really sticks well to the rocks and holds the algae in place despite the rough ocean water.