101Leafy researched the games.
Marine Fisher
Japanese name: マリンフィッシャー (Monster Hunter Portable 2nd G official guidebook, Enterbrain, 2008, pp. 756–761).

Made of Piscine materials. Large numbers of shells fly from its tip. Shelling Lv1
| Weapons | Gunlance |
|---|---|
| Rarity | 3 |
| Attack | 299 |
| Element | Water 100 |
| Slots | 0 |
| Shelling | Long Type, Level 1 |
| Price | 6,200z |
Materials
Forge
- Plesioth Fin x4
- Plesioth Scale x6
- Iron Ore x20
- Burst Arrowana x10
Upgrade
Upgraded from
Upgrades to
Gunlance
From the guide book
A solid guard and powerful shelling
The Gunlance is a Lance variant with added shelling. It has a lot in common with the Lance, such as a strong guard and steps in place of a roll. What sets it apart is its shelling, fired from loaded shells, and its special move, the Wyvern's Fire. Master normal attacks, steps and shelling, and you can stand up to even the mightiest foe.
Our translation of the Monster Hunter Portable 2nd G official guidebook (Enterbrain, 2008), p. 170.