What is the region near bottom of a pond lake ocean called?

The benthic zone, also known as the benthos, is the region near the bottom of a pond, lake, or ocean. It includes the sediment surface and the water immediately above it. The benthic zone is home to a diverse array of organisms, including bacteria, algae, plants, and animals. Benthic organisms play an important role in the cycling of nutrients and the decomposition of organic matter.