What type of structure can be found in the coastal ocean?

Kelp forests are highly productive and diverse marine ecosystems typically found along coastlines in temperate regions. These underwater forests are made up of large brown seaweeds, primarily species of kelp that thrive in nutrient-rich waters. The coastal ocean provides the right conditions for these kelp forests to flourish, owing to the availability of light for photosynthesis and the nutrients often brought in by upwelling currents. Kelp forests play essential roles in their ecosystems, offering habitats for a wide variety of marine life, helping to stabilize sediments, and contributing to the productivity of coastal waters.

Other structures, such as coral atolls, although significant, are typically found in warmer tropical waters rather than in typical coastal environments. Marine trenches occur in deeper ocean zones and are not representative of coastal areas. Open plains refer to stretches of sandy or rocky sea floor that lack the rich biological diversity and structure provided by kelp forests.