Question

These animals are called the vacuum cleaners of the sea

Answer 1

When sea cucumbers scavenge theocean floor for their food, “tiny particles like algae, minute aquaticanimals, or waste materials,” they're also eating lots of sand.

Answer 2

sea cucumbers!!

When sea cucumbers scavenge the ocean floor for their food, “tiny particles like algae, minute aquatic animals, or waste materials,” they're also eating lots of sand.