Beginner Guide
Start your first ocean adventure with a complete beginner guide. Learn how to aim your harpoon, time your reels, catch your first fish, and understand the essential progression systems.
Harpoon a Fish
Independent Fan-Made Roblox Guide
Dive into a wild ocean adventure where every catch counts. Harpoon sea monsters, discover over 1,800 unique fish, grow your aquarium pets, and gain enough weight to explore the mysterious depths. Master your timing and compete with other divers for the rarest trophies.
Roblox Fishing SimulatorFirstTry1,800+ Fish · Developer ClaimAquarium & Evolution
Latest Guides
- aquarium · 2026-10-17Harpoon a Fish aquarium upgrades: Growth Boosts, Cash, and Slot Questions
- codes · 2026-10-17Harpoon a Fish codes: MONSTER Rewards and What Is Confirmed Today
- depth · 2026-10-17Harpoon a Fish how to dive deeper: Weight, Progression, and What to Check
- fish · 2026-10-17Harpoon a Fish fish list: Five Confirmed Creatures and Index Limits
Start Here
Your Harpoon a Fish Journey
How to Dive Deeper
Discover how gaining weight lets you sink into deeper waters. Learn how to progress beyond shallow areas, prepare for larger sea monsters, and unlock more challenging catches.
Harpoon and Catching Guide
Master harpoon targeting, reel timing, and competitive fishing. Learn how to secure difficult catches and handle the game's unique fish-stealing mechanic.
Fish Evolution and Aquarium
Turn your catches into growing aquarium pets and build an impressive sea monster collection. Understand fish evolution, rarity, and the systems that make rare catches valuable.
FROM THE WIKI
Explore Harpoon a Fish Guides
aquarium
Harpoon a Fish aquarium upgrades: Growth Boosts, Cash, and Slot Questions
Understand confirmed Harpoon a Fish fish-growth and cash boosts, listed Robux prices, VIP availability, and what is unknown about aquarium slots.
Read guidecodesHarpoon a Fish codes: MONSTER Rewards and What Is Confirmed Today
Find the developer-listed MONSTER code for 3,000 XP and 3 Ruby Keys, plus spelling checks and the limits of its verified status.
Read guidedepthHarpoon a Fish how to dive deeper: Weight, Progression, and What to Check
Learn why weight matters for diving deeper in Harpoon a Fish, what the developer confirms, and which depth requirements remain unverified.
Read guidefishHarpoon a Fish fish list: Five Confirmed Creatures and Index Limits
Find five Harpoon a Fish creatures confirmed by official catch badges, plus what is known about the fish index and missing spawn information.
Read guidefishHarpoon a Fish fish mutations: Confirmed Trigger and the 2x Luck Pass
Harpoon a Fish mutations can trigger when you harpoon a fish. See what the official 2x Luck pass confirms about the chance and what remains unknown.
Read guidefishHarpoon a Fish world record fish: What the Per-Species Badge Means
Understand Harpoon a Fish's WORLD RECORD badge, why species matters, and which record weights and holder claims remain unverified.
Read guideguideHarpoon a Fish badges: All 12 Official Listings and Their Stated Goals
See the 12 officially listed Harpoon a Fish badges, including catch milestones, Bait Crafter, WORLD RECORD, and requirements the descriptions leave open.
Read guideguideHarpoon a Fish beginner guide: First Catches, Aquarium, and Deeper Dives
Start Harpoon a Fish with the official catch-and-grow loop: aim, fire, time your reels, keep fish in your aquarium, and progress toward deeper water.
Read guideHarpoon a Fish
What is Harpoon a Fish?
Harpoon a Fish is a Roblox fishing and ocean exploration simulator developed by FirstTry. Players dive beneath the surface, fire harpoons at moving fish, and carefully time their reels to secure catches. The game features more than 1,800 unique fish and sea creatures to discover.
Unlike traditional fishing simulators, Harpoon a Fish challenges players to gain weight and sink into deeper ocean zones. Players can also compete to steal catches, evolve rare fish, and raise their collection in an aquarium. Every dive offers new discoveries and opportunities to grow stronger.
- Developer
- FirstTry
- Platform
- Roblox
- Fish Collection
- 1,800+ · Developer Claim
- Core Systems
- Harpoons, Depth & Aquarium
Explore Harpoon a Fish
Find codes, first steps, catching mechanics and collection guides.
01
Harpoon a Fish Codes
Find the latest developer-announced Harpoon a Fish codes and their rewards. Check which codes are listed by FirstTry and discover how free XP and Ruby Keys can help you progress through your fishing adventure.
MONSTER3,000 XP and 3 Ruby KeysDeveloper Listed02
Harpoon a Fish Beginner Guide
Learn how to play Harpoon a Fish with a beginner-friendly introduction to the game's core mechanics. Discover how to aim, fire, reel in your first fish, increase your weight, and start building your aquarium collection.
1
Find a fish underwater, aim your harpoon at the target, and fire.
2
Time your reels correctly to pull in the fish and complete your catch.
3
Increase your character's weight to sink deeper and discover new sea monsters.
4
Place caught fish in your aquarium to grow them as pets.
03
Harpoon a Fish Depth Guide
Discover how the game's weight-based diving system works and why becoming heavier allows you to explore deeper underwater areas. Learn the relationship between character weight, ocean depth, and discovering new sea monsters.
1
Begin exploring accessible underwater areas and catch fish with your harpoon.
2
Increase your character's weight to improve how deeply you can sink.
3
Descend into deeper ocean areas to encounter additional sea monsters.
4
Continue exploring deeper waters while expanding your collection of unique fish.
04
Harpoon a Fish Fish Index
Explore the fish collection system featuring more than 1,800 unique fish and sea creatures announced by the developer. Learn how discovering new species, exploring deeper waters, and collecting rare monsters contribute to your fish index.
1,800+ Fish
The developer advertises more than 1,800 unique fish to discover and collect.
Fish Index
Fill your collection index by discovering different fish throughout the game.
Sea Monsters
Explore deeper underwater environments to encounter new sea monsters.
Rare Catches
Search for rare fish that can become part of your growing collection.
05
Harpoon a Fish Harpoon Guide
Master the essential harpoon mechanics used to catch fish and sea monsters. Learn how aiming, firing, and correctly timing your reels work together, and understand why other players can compete for the same catch.
1
Locate an underwater fish or sea monster and aim your harpoon at it.
2
Fire the harpoon toward your chosen target.
3
Time the reel actions to pull your hooked fish toward you.
4
Complete the catch while accounting for other players who may attempt to steal the same fish.
06
Harpoon a Fish Stealing Guide
Learn how the competitive fish-stealing mechanic makes underwater fishing more challenging. Discover how players can harpoon another player's fish, compete for valuable catches, and fight to claim the final trophy.
1
Find another player attempting to catch a fish underwater.
2
Aim your harpoon at the fish another player is trying to catch.
3
Fire and use the reel timing mechanic to compete for the catch.
4
Only one player can ultimately claim the contested trophy.
07
Harpoon a Fish Evolution Guide
Discover the fish evolution system and learn how it connects to growing larger and rarer sea monsters. Explore the role of evolution in developing your collection and building an impressive lineup of underwater creatures.
Fish Evolution
The developer confirms that caught fish can evolve as part of the game's progression system.
Monster Growth
Grow sea monsters toward larger sizes through the game's growth and evolution mechanics.
Rare Monsters
Discover and develop rare sea creatures as part of your collection.
Collection Progress
Combine fish discovery, evolution, and monster growth while expanding your collection.
08
Harpoon a Fish Aquarium Guide
Learn how to use the aquarium system to turn caught fish into growing pets. Discover how aquarium collection, fish growth, and rare sea monsters fit into the game's long-term progression.
1
Catch a fish by firing your harpoon and successfully completing the reel sequence.
2
Place your caught fish in the aquarium to keep it as a pet.
3
Grow your aquarium pet using the game's fish growth mechanics.
4
Expand your collection with additional fish and rare sea monsters discovered during your dives.
Harpoon a Fish FAQ
Quick answers from the developer’s game description.
What is Harpoon a Fish?
Harpoon a Fish is a Roblox experience by FirstTry. Aim and fire at fish, time your reels and keep catches in an aquarium.
How do you dive deeper?
The developer describes weight as the key to sinking deeper and finding additional sea monsters.
What does the MONSTER code give?
The official game description lists MONSTER for 3,000 XP and 3 Ruby Keys. A developer listing is not a guarantee that redemption will remain available.
Is this an official website?
No. This is an independent fan guide and is not affiliated with FirstTry or Roblox.
Ready to Master Harpoon a Fish?
From landing your first catch to hunting rare deep-sea monsters, our independent guides help you explore every part of Harpoon a Fish. Discover working codes, learn harpoon techniques, progress through deeper waters, and build your ultimate aquarium collection.
Read the Beginner Guide