The small organs of equilibrium in scyphozoan jellyfishes are called

The small organs of equilibrium in scyphozoan jellyfishes are called statocysts.

The statocyst is a sensory organ that consists of a sac-like structure which contains a mineralised mass (statolith) and numerous innervated sensory hairs-setae. When the animal accelerates, the statolith's inertia causes it to push against the setae and that's the way to detect gravity.

Answer;

Statocysts

Explanation;

-The small organs of equilibrium in scyphozoan jellyfishes are called statocysts, and these are borne in more complex sense organs called rhopalium.

The statocyst is a balance sensory receptor present in some aquatic invertebrates, including molluscs, bivalves, cnidarians, ctenophorans, echinoderms, cephalopods and crustaceans. These structures aid in orientation and balance during swimming in medusae and are located around the margin of the bell in Craspedacusta.