Mirissa Spinner Dolphin (Stenella longirostris) rotational mechanics: acoustic social signaling?

Spinner Dolphins (Stenella longirostris) congregate in mega-pods of 100 to 500 individuals over the continental shelf off Mirissa and Weligama. They are renowned for their aerial acrobatics, leaping up to 3 meters out of the water while spinning rapidly along their longitudinal axis (averaging 2 to 7 full rotations per leap). Biomechanically, the spin is initiated underwater: the dolphin curves its body and applies lateral torque using its caudal flukes right before breaching. The behavioral drivers are multi-fold: dislodging hydrodynamic ectoparasites (Remoras), re-aligning sensory organs after nocturnal deep-water squid hunting, and generating acoustic splash shockwaves that coordinate pod movement across wide ocean areas.