101Leafy researched the games.
Deep Ocean

An extension of a Piscine. Its shells have tsunami-like power. Shelling Lv2
| Class | Gunlance |
|---|---|
| Rarity | 6 |
| Attack | 391 |
| Water | 300 |
| Slots | 0 |
| Price | 40,000z |
Upgrades
| Upgraded from | Deep Fisher |
|---|---|
| Upgrades into | Sea King Gunlance |
Upgrade tree from モンスターハンターポータブル 2nd G 公式ガイドブック (Enterbrain, 2008), page 758.