They can be 2-40 feet deep (the sunlight still has to shine on the kelp for photosynthesis)
animals eat off of it
Its conditions are that kelp forests grow along rocky coastlines in depths of about 2m to more than 30m. Kelp gives nutrient-rich food to fish. They grow in cold water.
kelp forest (Kelp forests, underwater areas with a high density of kelp)
there both forests