Subnautica Codexery

Jellyfish

Gentle drifters of the shallow seas, glowing softly in the dark.

The Jellyfish is a small, passive creature found throughout the shallow regions of Planet 4546B. Known for their translucent bodies and vibrant bioluminescence, they drift gracefully through currents without aggression. They are among the most recognizable fauna in the early game stages.

These organisms play a vital role in the ecosystem by filtering nutrients from the water. While harmless to observe, players must exercise caution when swimming too close, as physical contact can result in minor injury.

Classification
Fauna
Habitat
Shallow Waters, Jellyfish Groves
Behavior
Passive
Diet
Filter Feeder
Status
Extant
Threat Level
Minimal

Lore & Background

Throughout the history of Planet 4546B, Jellyfish have thrived in the upper ocean layers where sunlight penetrates most effectively. Their glowing patterns are believed to aid in mating rituals or attracting microscopic prey within their tentacles. Even after the catastrophic event that introduced alien pathogens to the deep sea, these shallow-dwelling creatures remained largely unaffected.

In the lore of the Precursors and subsequent human colonization, Jellyfish were documented as part of the baseline biodiversity before the Kharaa virus spread. They serve as a visual constant for survivors returning to the surface after exploring dangerous trenches. The specific locations known as Jellyfish Groves are named directly after these creatures due to their high density.

Their biology is simple yet resilient, allowing them to survive in varying salinity levels found across the Safe Shallows and Blood Kelp Zones. Unlike larger fauna that react fearfully to human presence, Jellyfish continue their drift regardless of nearby activity, making them a unique calming element in an otherwise hostile environment.

In Their Own Story

The night cycle cast long shadows across the Safe Shallows, but the darkness was never truly absolute here. As the survivor drifted along the kelp beds, a soft violet hum caught their peripheral vision. A school of Jellyfish pulsed in unison, drifting on invisible currents like living lanterns. There were no Reaper Leviathans here, only the gentle sway of tentacles and the quiet rhythm of breathing. For a moment, the crushing weight of survival lifted, replaced by the hypnotic glow of creatures that had thrived long before humanity arrived.

Reader's Guide

The Jellyfish is a passive fauna species native to Planet 4546B, commonly encountered in shallow waters and specialized groves. Unlike the dangerous predators lurking in deeper trenches, these creatures pose little threat to survivors unless physically agitated. Their primary role within the game world is environmental storytelling; their presence often signals safe zones rich with resources.

Visually, they are defined by translucent bells that pulse with soft blue or violet light, illuminating dark underwater caves and reefs. This bioluminescence serves as a natural beacon for players navigating the abyssal depths without artificial lighting. While they lack combat abilities, their tentacles deliver a minor sting upon contact, serving as a gentle reminder to respect local wildlife.

Their arc is static; they do not evolve or change behavior based on player actions. However, spotting them early in gameplay provides comfort during initial survival phases. They are frequently photographed by players for PDA data and remain iconic symbols of the planet's serene beauty amidst its hidden dangers.

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