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Kelp
Kelp is especially stunning when seen from below because it can look just like lush, leafy woodland. Nutrient-rich kelp may show up on the beach as torn piles of seaweed, but underwater it has a whole different life. A type of brown algae, this plant can grow up to 18 inches per day and can reach depths of up to 131 feet—hence why their habitats are called kelp forests.
When scientists stumbled upon a kelp forest in the Pacific Ocean in 2007, the discovery highlighted how much we still have to learn about the world’s waters. Prior to this discovery, biologists thought kelp could not grow in warm tropical waters.
