Question

this diagram shows a food chain from chesapeake bay, an estuary ecosystem in maryland and virginia. the arrows show how the matter eaten by organisms moves through the food chain. select each organism below that is both a predator and prey in this food chain. phytoplankton common grass shrimp atlantic silverside bluefish pelican

Explanation:

In a food chain, a predator is an organism that eats other organisms, and prey is an organism that is eaten. Phytoplankton is a producer (not a predator or prey in the sense of consuming other animals). Pelican is only a predator (eats bluefish). Common grass shrimp eats phytoplankton (prey for it is phytoplankton) and is eaten by Atlantic silverside (so it is prey). Atlantic silverside eats common grass shrimp (predator) and is eaten by bluefish (prey). Bluefish eats Atlantic silverside (predator) and is eaten by pelican (prey).

Answer:

common grass shrimp, Atlantic silverside, bluefish