The giant harpoon is a quest item used in the Deadliest Catch quest. The harpoon can be obtained by speaking to Linza at Hemenster. The harpoon should then be given to Jones, who uses it to try to catch the Thalassus.
Linza forging the harpoon
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| Items |
 Harpoon plans Giant harpoon Sea chart Thalassus tooth Builder's tea Lowland heather Sea legs potion |
| Rewards |
 Small cast net Big cast net |
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| Miscellaneous |
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