Lantern Urchins

Basic Information

Anatomy

Lantern Urchins possess a semi-rigid internal support lattice (not a full skeleton) surrounded by a collagen-like outer layer. They're circulatory system pumps a viscous silver-blue fluid that stores and conducts bioluminescent energy. They have photosensitive fronds to "see" light levels and movement.

Biological Traits

Reactive glow when startled or touched

Luminal pulse coordination when in groups

Genetics and Reproduction

Lantern Urchins reproduces through external spawning. Females release phosphorescent eggs into the water, while males emit luminous spores that drift down in glowing clouds. The eggs must be fertilized within minutes. Fertile zones are closely guarded by Ghostfeather Rays during this period.

Growth Rate & Stages

Hatchlings (Glintlings): Tiny, translucent spheres with faint glow; highly vulnerable.

Juveniles (Sparklets): Gain soft spines and begin to develop color.

Adults: Fully glowing, capable of forming bonds with other marine life.

Ecology and Habitats

Found only in bioluminescent coral reefs and tide-glow bays. They require both clean saltwater and access to ambient vibrations (from waves, echoing stones, or singing Ghostfeather Rays) to survive. They thrive in aural and visual harmony.

Dietary Needs and Habits

Filter feeders. They consume microplankton and ambient magick particles known as noctis motes that drift through water currents, attracted by the urchins’ light.

Biological Cycle

During moonless nights, Lantern Urchins dim their light completely, entering a meditative stasis known as the Silent Fade. This helps conserve energy and is believed to be linked to dreamlike psychic phenomena.

Additional Information

Uses, Products & Exploitation

Glowcore Extract: Used in alchemy and lighting charms

Spines: Collected (after natural shedding) for ceremonial pens and fine tuning forks

Light Rhythm Crystals: Bioluminescent memory pulses can be recorded and harvested for ambient song-casting

Geographic Origin and Distribution

While Native to the eastern waters of Vayu Sachana, Lantern Urchins can be found all across Caelum Prime where Ghostfeather Rays can travel freely.

Average Intelligence

Limited. Operates on instinctual collective behavior and basic emotional response to sound/light. No tool use or hunting strategies. Displays a pack-level empathy through synchronized glowing.

Perception and Sensory Capabilities

  • Light perception through skin
  • Vibration-sensitive core allows them to detect sound patterns from over a kilometer away underwater
  • Chemical touch receptors help them determine water purity and emotional state of bonded rays

Symbiotic and Parasitic organisms

Lantern Urchins have a symbiotic relationship with Ghostfeather Rays. The rays protect Lantern Urchins during their vulnerable spawning periods. In return, the urchins emit calming patterns of light and sound that soothe the rays’ migratory anxiety and help them navigate treacherous waters at night. It’s believed that rays “dream” through the patterns the urchins emit.

Table of Contents

Scientific Name
Photalia vespertilis
Lifespan
10 to 14 years
Conservation Status
Near Threatened

Lantern Urchins are protected by various coastal conservation efforts, especially in regions where their symbiotic partners, Ghostfeather Rays, are also at risk. National and local marine sanctuaries collaborate to protect their spawning grounds from dredging and pollution.

Average Weight
3 to 4.5 kg
Average Length
Diameter: about 0.6 m
Average Physique

Round, slightly flattened dome; semi-soft undershell with flexible spines arranged like sea anemone tentacles.

Body Tint, Colouring and Marking

Iridescent blue-green bodies flecked with violet bioluminescent nodules along their spines. These nodules pulse gently in rhythm with the tides or ambient sound.

Geographic Distribution
I have not seen these creatures with my own eyes and wonder if they are still on the near threatened list. It would be a shame if they were extinct. I've seen the crystals used in music. Beyond that, they have a good relationship with the Ghostfeather Rays. I have a feeling that if one goes, so does the other. While my knowledge of marine life and the ecosystem of the ocean is limited, even I know that losing both would through everything out of balance. And we Humans would be affected as well. Hmmm... Do I know anyone with the right knowledge to ask about this?


Cover image: by Lady Wynter by way of NightCafe

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