Fauna
The Colossal Filter-Beast is the largest mobile organism known on Originis, an elongated cetacean and cephalopod hybrid measuring 12 to 18 meters in length and 18 to 42 metric tons in mass. The body is a slow tapering torpedo: a broad, flattened head 3 meters wide, a mid-body of seven concentric muscle rings each ringed with paired ventral fluke-paddles, and a long terminal tail that ends in a vertically-set crescent fluke 4 meters across. The dorsum is a deep abyssal indigo that shades through midnight-violet to a pale silver-blue ventrum, scattered all along the flanks with white speckles arranged in non-random clusters that map, with eerie precision, the local star-fields visible from Murond's surface. The hide is smooth and rubbery to the touch, cool, and slick. It is sheathed in a translucent slime-veil that glows a perpetual soft pearlescent moonlight-white at roughly 480 nanometers. Ventral feeding-patches can flare to 2 lux at one meter, drawing plankton clouds toward the open mouth in slow spiraling currents. Eight pearl-milky eyes, each the size of a Veyari shield and lacking visible pupils, run in a vertical four-on-four stripe down each side of the head. They see primarily by listening, perceiving the leyline-song of plankton long before the actual shapes resolve into focus. The mouth is a vast circular maw 2.5 meters across, fringed by 24 prehensile sensing tentacles each 1 to 3 meters long that taste the water and herd plankton inward. Behind the lip-fringe lies a baleen-like curtain of crystalline gill-rakers, faintly opalescent, that filter even fine spore-dust from the abyss. The beast moves with an almost geological slowness, cruising at 1 to 3 kilometers per hour. At rest it hangs vertical, head-down, in the great abyssal lakes of the Murond continent, glowing like a sunken cathedral lantern visible from the surface as a faint moon-spot suspended 400 meters below the wave-line, swaying very slightly with the deep tide of the Pale Sister overhead.
Era: The Deep Resonance (era1). The Thal amphibious blue-grey kindreds of Murond name the species 'Vael-mor' — 'the lantern that listens.' Thal songcraft holds that filter-beasts are older than the Veyari split, that they first sang the abyssal lakes into harmonic stability during the Deep Resonance, and that every adult specimen carries in its body a 320-year memory of every leyline pulse it has heard. To slay a filter-beast is the gravest crime under thal-song-law — punishable by exile to the dry lands and the severing of the singer's chord-node. When a filter-beast dies near a Thal settlement the kindred enter a year of low-song mourning, and the body is towed by ceremonial barge into a deep-current trench where it is allowed to drift downward, glowing fainter, for as many days as it takes. The natural spring-tide molt of the slime-veil is the only sanctioned harvest: the gossamer sheets are cured into 'lantern-lacquer,' a luminescent varnish painted onto the inner walls of every Thal birthing-pool. Three legends are sung at every kindred-feast: the Lantern of the Deep Resonance who guided the first Thal to the breathable abyssal vents, the silent year of 1,118 ST when every filter-beast on Murond surfaced together at the same minute, and the prophecy that on the day a filter-beast is born above the surface of the water the planet will change keys.