Shellexia Major

The Chitinous Scuttler (*Benthovora clausa*) is an arthropodiform predator endemic to Shellexia Major’s lagoons. Its carapace mimics porous dead coral, camouflaging against the reef’s shadowed underbellies. Eight articulated limbs ensure silent traction across rough substrates, while sensory whiskers detect water displacement within the dense benthic zone. It hunts beneath Cyclonema aggregations, massive colonial filter-feeders suspended in currents. Utilizing a rasping proboscis, the Scuttler extracts soft tissue without collapsing structures. As an apex consumer, it regulates overgrowth to maintain reef health, operating nocturnally to avoid competition with diurnal grazers above.

Lithospora reefus, or Filter-Structure, dominates Shellexia Major's shallow shelves as a colossal, stationary producer. Its porous, lattice-like body filters nutrient-rich currents while actively sequestering the mineralized excretions of passing Cyclonema swarms. This symbiotic ingestion transforms toxic waste into vibrant, crystalline growths that fortify its skeletal framework against oceanic erosion. These structures function as foundational ecosystems, creating complex micro-habitats for lesser fauna within their calcified crevices. Their slow, rhythmic pulsation regulates local water chemistry, stabilizing pH levels critical to the reef supercontinent's broader biodiversity. Field observers note that a colony's health directly correlates with Cyclonema migration density, marking them as vital bio-indicators of planetary metabolic cycles.

Psocoides pelagica, or the Micro-Scavenger, is a microscopic filter-feeder that exclusively colonizes the calcified integument of migrating Cyclonema. These translucent crustaceans drift in dense clouds across Shellexia Major's coral supercontinent, feeding on particulate detritus dislodged by their host's rhythmic pulsations. Their semi-transparent bodies blend seamlessly with the Cyclonema's surface, rendering them invisible to predators while they efficiently process organic debris into nutrient-rich waste for the reef ecosystem. During migration seasons, billions of these scavengers hitch rides on a single host, creating a shimmering, living halo around the massive creature. Once the Cyclonema reaches its spawning grounds, the Micro-Scavenger detaches in synchronized waves, sinking to the seabed to decompose lingering biomass. This symbiotic relationship ensures rapid nutrient cycling throughout the pelagic zone, maintaining the delicate chemical balance of Shellexia's vibrant underwater cities.