@szakib yes, bivalves remove tens of thousands of tons of nitrogen a year from waters around the world (indirectly), by eating plankton that metabolized the nitrogen! they excrete a small amount of nitrogen back into the water, but for many species it ends up working up to net removal! there are even some unusual clams, like giant clams, that partner with photosymbiotic algae within their bodies. they actually suck up nitrogen directly, to feed their internal symbionts, and basically never pee because their symbionts just keep cycling all the internal nitrogen of the host! #clamFacts