what are the similarities between the pelagic zone and the benthic zone?
<answer> The pelagic zone can be contrasted with the benthic and demersal zones at the bottom of the sea and The benthic zone is the ecological region at the very bottom of the sea. <context> The pelagic zone can be contrasted with the benthic and demersal zones at the bottom of the sea. The benthic zone is the ecological region at the very bottom of the sea. It includes the sediment surface and some subsurface layers. Marine organisms living in this zone, such as clams and crabs, are called benthos.