Hello Student ,

The various feeding mechanism found in living organism are as follows :

Feeding in Liquid Feeders/ Fluid Feeders

1. Diffusion - Absorption through general body surface
2. Pinocytosis - Ingestion of liquid food through invagination by surface of the body .
3. Blood Sucking

Feeding in Microphagous Animals/ Filter Feeders

1. Food is suspended in water and they have filtering devices  for feeding.

Hope this helps .