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In ideal conditions, kelp can grow up to 18 inches in a single day. Kelp forests provide food and shelter for thousands of species, NOAA says.

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In ideal conditions, kelp can grow up to 18 inches in a single day. Kelp forests provide food and shelter for thousands of species, NOAA says.ILLUSTRATION · AI

In ideal conditions, kelp can grow up to 18 inches per day, NOAA says.

Giant kelp canopies tower above the ocean floor, in stark contrast to slow-growing corals. Like trees in a forest, these giant algae provide food and shelter for thousands of species.

Kelp forests generally occur in cold, nutrient-rich waters. Because they depend on light for photosynthesis, they form in shallow open waters and are rarely found deeper than about 49 to 131 feet.

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