SIMON FRASER / SCIENCE PHOTO LIBRARY SIMON FRASER / SCIENCE PHOTO LIBRARY
Breaking wave during an algal bloom in the sea. The green colour of the water is due to millions of marine algae, microscopic plants that increase in numbers (bloom) between spring and autumn, due to increased levels of sunlight. The algae are the basis of a food chain that supports large amounts of marine life in the oceans. Photographed off the coast of Cornwall, UK.
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