Question

sponge - shape of life
what role do sponges play in the ocean ecosystem?
decomposers
primary producers
top predators
filter feeders that clean water

Explanation:

Sponges are filter feeders. They draw in water through small pores, filter out food particles like plankton, and expel the filtered water. This process helps in cleaning the water. Decomposers break down dead organic matter (e.g., bacteria, fungi). Primary producers make their own food via photosynthesis (e.g., plants, algae). Top predators are at the top of the food chain (e.g., sharks).

Answer:

Filter feeders that clean water