The algae invasion

One of the world's simplest organisms is also one of the hardest to classify.

By Stephen Ornes, 00:00 AM May 11, 2010

Algae: You know it when you see it. It’s the slimy green carpet that blankets the top of ponds or neglected swimming pools. It may be long strands of seaweed, sometimes used for fertilizer or food, that sway with the ocean tide. Or, algae may show up as the poisonous red tides that bloom near the coast and threaten marine life.

This type of algae is kelp, and kelp forests are sometimes called the rainforests of the seas. This kelp forest is in Monterey Bay off the coast of California.

This type of algae is kelp, and kelp forests are sometimes called the rainforests of the seas. This kelp forest is in Monterey Bay off the coast of California.

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