Sea cucumbers — those chubby tubes of flesh that scooch around the ocean floor — have a very special talent: The tubular creatures are elite poopers, collectively expelling more than 70,000 tons (64,000 metric tons) of sandy poop out of their bottoms each year.

That’s not an estimate for the entire globe; that’s how much sea cucumbers poop on a single coral reef, per year. And even that tremendous number may be an underestimate, according to a new study, published Feb. 2 in the journal Coral Reefs