What are the aquatic organisms that grow in the sediments at the bottom of a pond or lake called?

Aquatic organisms that grow in the sediments at the bottom of a pond or lake are called benthic organisms. This group includes various species such as algae, bacteria, worms, and small invertebrates that play crucial roles in nutrient cycling and the overall health of the aquatic ecosystem. They often serve as a food source for higher trophic levels, contributing to the pond or lake's food web.