We have cataloged a fragile yet highly resilient solitary drifter within the mid-pelagic data vacuum: Aetheria parametrica (vernacular: Parametric Veil-Ray). While its predatory and colonial contemporaries depend on dense chitinous plating or hyper-pressurized internal viscera, A. parametrica maintains a state of structural weightlessness, moving as a continuous mathematical ripple across the topological dark. The specimen’s architecture is anchored by an 11-segment metameric chorda. Radiating from each vertebra are three distinct, overlapping laminae of gossamer ribs (meshGroups), forming a tri-layered undulating veil. This semi-permeable mantle does not flap mechanically; it propagates sinusoidal transverse waves along its longitudinal axis, allowing the creature to transition seamlessly between hovering station-keeping (cruise), low-energy drift (idle), and broad spatial glides (soar). At its apex, two 14-jointed antennal whips adorned with mechanoreceptive setae constantly sample field gradients, counterbalanced by 18-jointed caudal flagella that cancel micro-vortices in its wake. Behavioral & Interactive Analysis: Unlike simple reactive automata, A. parametrica exhibits a dual psychological reflex when confronted with sudden external observer stimuli (cursor clicks): Reflex α — Evasive Bolt (startle → flee): An explosive surge in kinodynamic velocity (up to 9.0 m/s). The mantle flutters violently at triple its nominal frequency, banking hard along an erratic vector before settling into a rapid escape trajectory. Reflex β — Involute Defensive Stasis (curl): A total kinetic arrest. The metameric spine contracts into a tight involute spiral, drawing the delicate triple veils and antennae inward against the central core. During this state, the organism undergoes high-frequency micro-shivers (40–45 Hz)—a tactile defensive posture meant to minimize surface exposure until the disturbance passes.