Difficult to forge with, but its water-retention properties make it popular as armor lining.
| Village 8★ // Airship Upgrade: Plesioth | Reward1 | x1 | 18% |
| Village 8★ // Fishing's Lure | Sub | x1 | 18% |
| Village 9★ // A Jungle Just for You | Reward2 | x1 | 18% |
| Hub 5★ // A Plesioth in the Misty Peaks | Reward1 | x1 | 18% |
| Hub 5★ // A Plesioth in the Misty Peaks | Sub | x1 | 18% |
| Hub 5★ // Awful Guest | Reward1 | x1 | 18% |
| Special Permit // Redhelm VII: Capture | Sub | x1 | 18% |
| Hub 6★ // The Plesioth Adventure | Reward1 | x2 | 8% |
| Awful Guest | Reward1 | x1 | 10% |
| Awful Guest | Reward2 | x1 | 8% |
| Lance | Aqua Spear LV1 | x2 |
| Dual Blades | Plesioth Cutlasses LV2 | x3 |
| Insect Glaive | Fin Harpoon LV1 | x2 |
| Insect Glaive | Acorn Rod LV3 | x4 |
| Heavy Bowgun | Pressurized Plaser LV1 | x2 |
| Great Sword | Plesioth Watercutter LV1 | x1 |
| Great Sword | Cataclysm Sword LV4 | x3 |
| Sword & Shield | Odyssey Blade LV2 | x2 |
| Sword & Shield | Weary Finsword LV1 | x2 |
| Lance | Rockabye Spear LV1 | x4 |
| Switch Axe | Finslash LV1 | x2 |
| Gunlance | Marine Fisher LV1 | x4 |