SUBNAUTICA / TIPS

Check Biome Boundaries

A short trip can transition from safe coral to dangerous predator territory.

QUICK REFERENCEFirst SubnauticaReviewed 2026-10-28Reference / noindex

OVERVIEW

Understanding Check Biome Boundaries

A short trip can transition from safe coral to dangerous predator territory.

This is an original reference for the first Subnautica. Your current depth rating, oxygen, available tools and navigation route determine when an objective is practical. Follow actual in-game PDA and Fabricator information for any values that vary by version.

PRACTICAL APPROACH

How to use this information

Use the edges of known biomes and retreat when visibility changes abruptly.

COMMON MISTAKES

What to avoid

Dangerous zones do not always announce themselves with a warning icon.

CONTINUE ON VOLPEDIA

Related topics and walkthroughs

GUIDESBiomes And Safe Navigation

Navigate Subnautica from the shallows to the deep caves

CREATURESAmpeel

An electrically charged predator associated with deeper or more dangerous biomes.

BIOMESBlood Kelp Zone

A dark biome with white bloodvine and connections toward Lost River.

CREATURESBoomerang

A familiar edible fish encountered in shallower biomes.

BIOMESBulb Zone

A northeastern biome with bulbous blue plants and several hostile animals.

An open sandy biome associated with Reapers and scattered resources.

BIOMESGrand Reef

A deep blue biome with floating anchor pods, advanced resources and dangerous creatures.

Independent Volpedia editorial encyclopedia about the first Subnautica, reviewed 2026-10-28. Unaffiliated with Unknown Worlds Entertainment. Category illustrations are original diagrams, not in-game maps, screenshots or exact creature portraits. No fabricated damage statistics, spawn probabilities or detailed map coordinates. References are documented privately and not shown as outbound research buttons.