Question

sponge - shape of life
what do sponges primarily eat?
small fish
crustaceans
algae and plankton
other sponges

Explanation:

Sponges are filter - feeders. They draw in water through their pores, filter out small particles such as algae and plankton, and then expel the remaining water. Small fish and crustaceans are too large for sponges to consume as their primary food source. Sponges do not typically eat other sponges as a main diet.

Answer:

Algae and plankton