Fact 1: Sponges are a source of food for many species of fish.

Fact 2: Most sponges are sessile.

Given the two facts above, answer the question "What can be a source of food for many species of fish?" with the following options: 
- Fully cooking the oysters
 - Organic compounds
 - beef
 - fishing poles
 - sessile organisms
 - barnacles
 - grass
 - gastropod shells


 

     sessile organisms    