Kelp is a type of large brown seaweed that grows in underwater forests in shallow ocean waters. It is known for its fast growth, with some species capable of growing up to 18 inches per day. Kelp provides habitat and food for various marine life, including fish, sea urchins, and sea otters. Kelp is also harvested for its nutritional and economic value. It is rich in vitamins and minerals, making it a popular ingredient in health foods and supplements. Additionally, kelp farming is an environmentally friendly practice that helps support coastal ecosystems while providing sustainable resources.