Quick answer
Buy and equip Dynamite from the Forest island, then follow the current in-game control prompt for the use or throw action. The supplied sources do not verify a keyboard or controller button, so this guide will not guess one.
Use the prompt, not an old key guess
- Reach the Forest island shop where the walkthrough confirms Dynamite is sold.
- Place Dynamite in the active inventory slot.
- Read the contextual prompt shown for that slot or open the current Controls screen.
- Aim in a clear area and test away from important quest drops.
- Re-check the binding after switching between keyboard and controller.
Do you need it for progression?
The supplied completion walkthrough explicitly advises skipping both Dynamite and the beginner boss lure on Island 2 because neither is required for its chosen route. It saves money for the Shotgun instead.
That makes Dynamite an optional tool in the verified route, not a mandatory key for reaching the next island.
If nothing happens
- Confirm the item is selected, not merely present in inventory.
- Check whether another item is occupying your hands.
- Open Controls and look for the current use, throw or primary-action binding.
- Test with default bindings before assuming the item is broken.
Logbook note: No trustworthy How to Fish source in the supplied archive names the exact throw key. Specific button claims on unrelated fishing-game pages were excluded.
Source ledger
Sources
- Destructoid complete walkthrough — Island order, boss steps and equipment observations.
- How to Fish on Steam — Official identity, features, system requirements and game loop.