Kelp forests are underwater ecosystems formed by large groups of kelp, a type of fast-growing seaweed. These forests thrive in nutrient-rich, shallow waters along coastlines, providing habitat and food for a diverse range of marine life, including fish, sea urchins, and sea otters. Kelp can grow up to 18 inches a day, creating a dense canopy that offers shelter and protection for many species. These forests also play a crucial role in carbon absorption, helping to mitigate climate change by capturing carbon dioxide from the atmosphere.