In a pond ecosystem, benthos means

Benthos are the organisms that are found at the nethermost of stream bodies such as streams, rivers, and lakes. In 1891, the term Benthos was coined by Haeckel. Benthos are depending on the organic matter.

- The ponds and lakes are motionless or immobile freshwaters. In general, the ponds are thinner with depth less than 2 meters.
- In an ecosystem of pond or lake benthos (which are also known as the bottom dwellers) comprises snails, clams, mussels, crabs, prawns, etc.
- The benthos lives deep in any water resources. Since the intensity of the light is not capable of reaching such a depth of water, consequently, they hinge upon the organic matter.
- This deceased and putrefying matter of organisms withstand their nourishment chain.