The Octarine Key is a rare key. It is used to unlock a Locked Octarine Chest.
Obtaining
Crafting
| Materials | Crafting station |
|---|---|
 Octarine Bar (10) |  Key Casting Table |
Fishing
| Source | Catch type | Chance |
|---|---|---|
 Sea water Sunken Sea +  Normal water | Loot | 2.12% |
Drops
| Source | Chance for one | Chance per roll |
|---|---|---|
 Blue Slime | 1.12% | 1.12% (1) |
 Large Beached Jelly | 2.35% | 1.18% (1–3) |
 Large Driftwood Wooden Crate | 2.35% | 1.18% (1–3) |
Structure-exclusive loot
| Structure | Container | Quantity | Chance for one | Chance per roll |
|---|---|---|---|---|
| Sea Islands Sea Walls with Chest Coral-Covered Island Sea Camp Island (style 1) Sea Camp Island (style 2) Sea Camp Island (style 4) Sea Camp Island (style 6) Sea Oasis |  Seashell Chest | 1 | 2.7% | 0.68% (3–5) |
| Sea Melody Room (style 1) | Seashell Chest | 1 | 100% | 100% (1) |
| Sea Harbor Town | Seashell Chest | 4 | 100% | 100% (1) |
Structure-exclusive drops
| Structure | Source | Chance |
|---|---|---|
| Cove Stash |  Beach Digging Spot | 100% |
History
- 1.0.0.1: Sell value decreased from 118
to 114 . - 0.5.2.0-b84a:
- Reduced the cost of crafting keys at the Key Casting Table.
- Keys now also have a small chance to drop from all types of slimes, Cavelings, and from fishing.
- 0.5.0.0-9b96: Introduced.
