=== Major Planetary Zones | Regions | Wildlife ===

====== CRIMSON DEEPFISH ======

{{ :crimson_deepfish_gg_scenic_2d.png?200|}}



===== Overview =====

The Crimson Deepfish is a blind, slow-moving species native to the hydrothermal vent zones of [[ralar_bay|Ralar Bay]] on the [[dark_side|Dark Side]] of [[the_planet_voi_700_d|VOI 700 D]]. Navigating through complete darkness, this fish relies on vibration sensitivity and chemical trail detection to survive in the mineral-rich, geothermal waters.

Despite its small size and lack of vision, the Crimson Deepfish plays a vital role in the local ecosystem, feeding on microbial mats and serving as prey for larger predators like the [[glowfin_ray|Glowfin Ray]].

===== Physique and Appearance =====

  * **Size:** Up to 15 cm in length  
  * **Weight:** 1–2 kg  
  * **Body Shape:** Elongated and cylindrical, with smooth, scale-less skin  
  * **Coloration:** Jet-black skin veined with faint, glowing crimson patterns that pulse softly, resembling lava streams in the dark waters  
  * **Sensory Organs:** Lateral vibration sensors and chemical receptors along body flanks  
  * **Mouth:** Circular frill adapted for scraping microbial mats off rock surfaces  

===== Game Mechanics =====

  * **Armor Class (AC):** 10  
  * **Hit Points (HP):** 5  
  * **Speed:** 30 ft. (swimming)  

==== Attacks ====

  * **Gill Flare:** Releases a small cloud of irritating vent gas. Targets in a 5-foot cone must succeed on a DC 11 Constitution save or be disoriented (disadvantage on next attack).  

==== Special Abilities ====

  * **Thermo Navigation:** Gains advantage on Survival checks in geothermal environments.  
  * **Chemical Trail Detection:** Can locate vent outflows or nutrient plumes within 100 ft.  
  * **Defensive Glow:** The crimson vein-patterns flare brightly when disturbed, disorienting smaller predators in the darkness.  

===== Behavior =====

  * **Diet:** Microbial mats, chemosynthetic algae, extremophile microorganisms  
  * **Social Structure:** Solitary or found in small pods of 3–6 individuals  
  * **Activity Pattern:** Constantly active due to fluctuating vent emissions  

==== Survival Strategies ====

  * Clings to nutrient-rich rocks during periods of turbulence.  
  * Releases glittering vent gas clouds to confuse larger predators.  
  * Uses glowing veins defensively, creating an illusion of flowing lava in the water.  

===== Reproduction and Lifecycle =====

==== Reproductive Traits ====

  * **Spawning Season:** Unknown; believed to be triggered by vent activity  
  * **Egg Laying:** Deposits clusters of gelatinous eggs in vent crevices  
  * **Hatching Time:** 6–10 days post fertilization  

==== Lifespan and Growth ====

  * **Total Lifespan:** Estimated 5–7 years  
  * **Juvenile Phase:** Remain near natal vent system for safety  

===== Tactical Advice for Dungeon Masters =====

Crimson Deepfish are best used for atmosphere or ecological immersion. Their presence near geothermal anomalies can hint at vent zones, predator lairs, or scientific interest points.

  * **Environmental Clue:** The glowing vein patterns of a Deepfish may signal a nearby vent collapse or heat surge.  
  * **Specimen Hunt:** Players might be hired by researchers to capture a specimen for genetic analysis.  

===== Related Pages and Further Information =====

  * [[the_planet_voi_700_d|VOI 700 D]]  
  * [[dark_side|Dark Side]]  
  * [[ralar_region|Ralar Region]]  
  * [[ralar_bay|Ralar Bay]]  
  * [[the_wildlife_of_the_dark_sea_from_a_to_z|Known Wildlife of the Dark Sea]]  

**Known Predators:**  

  * [[glowfin_ray|Glowfin Ray]]