Deep Sea Exploration
Guide to exploring the deepest biomes safely.
📖 8 min read•Advanced•Updated 2026-03-15
💡 Quick Tip: The Abyss (400m+) requires Abyssal Tube. Don't attempt it without maximum oxygen capacity.
🌊Deep Sea Biomes
| Biome | Depth | Required Tube | Key Fish |
|---|---|---|---|
| Forgotten Deep | 0-100m | Starter | Cod, Salmon, Tuna |
| Ancient Sands | 100-200m | Pufferfish | Swordfish, Ancient Shark |
| Crystal Caves | 200-350m | Anglerfish | Crystal Fish, Rare species |
| The Abyss | 400-500m | Abyssal | Abyssal creatures, Legendary fish |
💡Deep Dive Tips
- Always plan your oxygen budget before diving deep
- Bring the best gun you can afford — deep fish have more HP
- Crystal Caves have narrow passages — watch your navigation
- The Abyss is dark — use the environment glow to navigate
- Sell fish frequently — don't risk losing a full inventory
⚠️ The Abyss has aggressive creatures that attack you. Be prepared for combat while managing oxygen.