Statocysts are organs that are unique to aquatic organisms, as they require the presence of sand grains to provide directional information.

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Statocysts are found in a variety of organisms, not just aquatic ones, and they do not necessarily require sand grains to function. They are sensory organs that help with balance and orientation, using statoliths (which can be sand grains in some aquatic organisms but are often other dense materials) to sense gravity and motion.

Statocysts Are Organs That Are Unique to Aquatic Organisms, as They