Abyss Fish Ruins Locations & Keys (February 2026) Find all 7 Fish Ruin
Table Of Contents
Discovering Fish Ruins in Roblox Abyss feels like uncovering hidden treasure beneath the waves. These locked structures guard some of the game’s most valuable rewards, from Star Shards to rare artifacts. I’ve spent countless hours exploring every corner of the Abyss to bring you this complete guide to finding all 7 Fish Ruin locations and obtaining the keys you need to unlock them.
What Are Fish Ruins in Abyss?
Fish Ruins are special locked structures scattered across all three major biomes in Abyss. Each ruin contains a treasure chest filled with valuable rewards including:
Cash (varies by biome and depth)
Star Shards (5-20 per chest)
Oxygen Pods (2-5 per chest)
Potions (Speed, XP, and Cash boosters)
XP (one of the best leveling methods in the game)
The most important thing to know? You can only open each Fish Ruin chest once. Once you’ve claimed the rewards, that’s it – no respawns, no second chances. This makes finding and unlocking all 7 ruins crucial for maximizing your progression.
Quick Facts About Fish Ruins
Feature
Details
Total Fish Ruins
7 (2 in Ocean, 2 in Ancient Sands, 3 in Spirit Roots)
Let me walk you through every single Fish Ruin location, organized by biome. I’ll tell you exactly where to find them and what landmarks to look for.
Ocean (Forgotten Deep) Fish Ruins
The Ocean biome, also called Forgotten Deep, contains 2 Fish Ruins that are relatively easy to access early in your Abyss journey.
Fish Ruin 1: Behind Virelia
Location: This is probably the first Fish Ruin you’ll encounter. It sits on top of a rock formation directly behind Virelia’s purple stall.
How to Find It:
Complete the tutorial and spawn at the Forgotten Deep hub
Locate Virelia (she’s hard to miss with that glowing purple cauldron)
Swim directly behind her stall
Look up – you’ll see the ruin perched on top of a stone structure
Key Required: Forgotten Key (obtained from Kraken Quest 5)
My Tip: This ruin is visible from the safe dome, so you can spot it immediately after completing the tutorial. Don’t stress about getting the key right away – focus on progressing through Kraken’s early quests first.
Fish Ruin 2: Between Scientist and Lost Captain
Location: This ruin sits at the midpoint between the Scientist NPC and the Lost Captain’s shipwreck, at a depth exceeding 200 meters.
How to Find It:
Start from the Forgotten Deep safe dome
Head east toward the shipwreck area
The ruin is positioned between the Scientist’s location and the Lost Captain’s ship
You’ll find it on top of a rock formation in deeper water
Key Required: Forgotten Key (obtained from Mr. Black Quest 8)
Depth Warning: At 200+ meters depth, you’ll need at least a Pufferfish Tube (120 oxygen, 200m max depth) to safely reach this ruin. Don’t attempt it with the starting tubes or you’ll run out of oxygen.
Ancient Sands Fish Ruins
The desert-themed Ancient Sands biome contains 2 Fish Ruins hidden among towering rock formations and sandy dunes.
Fish Ruin 3: Behind Suspicious Fisher
Location: This ruin sits atop a tall rock tower directly behind the Suspicious Fisher NPC.
How to Find It:
Teleport to Ancient Sands using the Scientist’s teleporter
Locate the Suspicious Fisher (he’s sitting on a stone pillar next to a tower)
Swim behind the tower structure
Look up to spot the ruin on top of the rock formation
Key Required: Ancient Key (obtained from Marcus Quest 5)
Notable: The Suspicious Fisher’s quest chain is also worth completing, as it unlocks a tower containing three Tier 2 Treasure Chests.
Fish Ruin 4: Beside Grumpy Hank Tower
Location: This ruin is positioned on a rock structure right next to Grumpy Hank’s tower, west of Crazy Jeff’s Store.
How to Find It:
From Ancient Sands safe dome, head southwest
Find Crazy Jeff’s Store under the big rock arch
Continue west until you reach Grumpy Hank’s tower
The ruin sits on a nearby rock formation beside the tower
Key Required: Ancient Key (obtained from Grumpy Hank Quest 4)
Shopping Tip: While you’re here, Grumpy Hank sells the Rukiry Tube ($40,500) – one of the best mid-game tubes for deep exploration.
Spirit Roots Fish Ruins
Spirit Roots, the late-game biome, contains 3 Fish Ruins spread across the upper and lower cave systems. These are the trickiest to find.
Fish Ruin 5: On Top of Isaac’s Safety Dome
Location: This ruin sits right in front of the Isaac NPC, perched on top of the Spirit Roots safety dome.
How to Find It:
Travel to Spirit Roots (requires Rukiry Tube or better – 350m depth)
Enter the Spirit Roots safe dome
Locate Isaac NPC
Look up – the ruin is literally on top of the dome structure
Key Required: Spirit Key (obtained from Victor Quest 4)
Easy Spot: This is the most visible ruin in Spirit Roots since it’s right at the entrance hub. You can’t miss it once you arrive.
Fish Ruin 6: Tunnel Below Isaac
Location: This ruin is hidden inside a tunnel directly underneath the Isaac NPC’s position.
How to Find It:
From Isaac’s location, check your map
Look for the tunnel entrance below his position
The ruin is located under the treasure chest marker near Isaac
Swim down into the tunnel system to find it
Key Required: Spirit Key (obtained from Victor Quest 7)
Cave System: Spirit Roots has an extensive underground cave network. This ruin is in the upper layer of tunnels, making it relatively accessible once you find the entrance.
Fish Ruin 7: Spirit Root Cave Near King Cat
Location: The final Fish Ruin is hidden inside the Spirit Root cave system, east of the Golem NPC, right before the entrance to King Cat’s area.
How to Find It:
From Spirit Roots safe dome, head east
Locate the Golem NPC
Continue east into the cave system
The ruin is positioned just before King Cat’s entrance
Key Required: Spirit Key (obtained from Golem Quest 2)
Final Challenge: This is the deepest and most remote Fish Ruin. Make sure you have the Lost Spirit Tube ($200,000) for comfortable exploration at these extreme depths.
How to Get All Fish Ruin Keys?
Every Fish Ruin requires a specific key type that matches its biome. You can’t use an Ancient Key on an Ocean ruin, and vice versa. Here’s exactly how to obtain each key type.
Complete Fish Ruin Keys Guide
NPC
Quest Number
Key Type
Biome
Notes
Kraken
Quest 5
Forgotten Key
Ocean
First key – easy to obtain
Mr. Black
Quest 8
Forgotten Key
Ocean
Requires mutation fishing
Marcus
Quest 5
Ancient Key
Ancient Sands
Main quest chain
Grumpy Hank
Quest 4
Ancient Key
Ancient Sands
Also sells Rukiry Tube
Victor
Quest 4
Spirit Key
Spirit Roots
First Spirit Roots key
Victor
Quest 7
Spirit Key
Spirit Roots
Second key from same NPC
Golem
Quest 2
Spirit Key
Spirit Roots
Relatively quick quest
Detailed Key Acquisition Guide
Forgotten Keys (Ocean/Forgotten Deep)
Kraken Quest 5:
This is part of the main tutorial quest chain
You’ll unlock this naturally as you progress through the early game
Rewards: Forgotten Key + Normal Tube + significant XP
My Progression Tip: Focus on completing Kraken Quests 1-5 consecutively for the fastest start
Mr. Black Quest 8:
Mr. Black specializes in mutation quests
You’ll need to catch fish with specific mutations
This is more challenging and requires the Radar ($250 from Richard)
Pro Tip: Buy the Radar early – it shows fish mutations, making Mr. Black’s quests much easier
Ancient Keys (Ancient Sands)
Marcus Quest 5:
Marcus is the main questgiver in Ancient Sands
His quest chain provides excellent money and XP rewards
Located near Crazy Jeff’s Store under the big arch
Progression Note: Complete Marcus’s quests while farming for the Wasted Gun ($18,000)
Grumpy Hank Quest 4:
Found west of Crazy Jeff’s Store in a building
His quest chain unlocks a tower with Tier 2 Treasure Chests
Also sells the crucial Rukiry Tube ($40,500)
Efficiency Tip: Save up to buy the Rukiry Tube from Grumpy Hank while doing his quests
Spirit Keys (Spirit Roots)
Victor Quest 4 & 7:
Victor appears after you complete Isolde’s quest chain
Located in the back area of Spirit Roots (behind a barrier)
Provides two separate Spirit Keys through his quest chain
Late-Game Content: You’ll need the Oxy Tube ($50,000) and Magroot Gun ($55,000) minimum
Golem Quest 2:
The Golem is a large stone NPC in Spirit Roots
Quest 2 comes relatively early in his chain
Easier than Victor’s quests
Quick Key: This is often the fastest Spirit Key to obtain
Crab Quest: Unlock All 7 Fish Ruins for Crab Claw Artifact
Here’s where things get really interesting. There’s a special NPC called the Crab who offers an additional quest that requires you to open all 7 Fish Ruins in Abyss.
How to Start the Crab Quest?
Prerequisites:
Find the Crab Scroll in Ancient Sands
Deliver the scroll to the Crab NPC
Accept the Crab’s quest to open all 7 Fish Ruins
Crab Scroll Location:
Hidden in a secret cave in Ancient Sands
Behind Grumpy Hank’s tower, at the base of a steep cliff
Inside a tunnel with no oxygen – bring Oxygen Pods
Look for a Crab statue holding the scroll in a hidden room
Crab Quest Rewards
Once you’ve opened all 7 Fish Ruins and return to the Crab:
Rewards:
Crab Claw Artifact (Legendary artifact)
Additional Star Shards (20-30)
Oxygen Pods (5-10)
Multiple Potions (various types)
Significant XP boost
Crab Claw Artifact Stats: The Crab Claw is one of the best artifacts for fish farming:
Increases fish catch rate
Boosts fish value multiplier
Provides weight capacity bonus
This artifact is essential for late-game fish farming and profit maximization.
Best Order to Open Fish Ruins
Based on my extensive playtime, here’s the optimal order to tackle Fish Ruins for maximum efficiency:
Early Game (Level 1-15)
1. Ocean Fish Ruin 1 (Behind Virelia)
Complete Kraken Quest 5 first
Use your first Forgotten Key here
Easiest to access with starting equipment
2. Ocean Fish Ruin 2 (Scientist/Lost Captain Area)
Complete Mr. Black Quest 8
Requires Pufferfish Tube minimum ($2,850)
Good XP boost for mid-game progression
Mid Game (Level 15-30)
3. Ancient Sands Fish Ruin 3 (Suspicious Fisher)
Complete Marcus Quest 5
Use Crossbow Gun ($10,000) and Boat Tube ($10,000)
Excellent cash rewards for equipment upgrades
4. Ancient Sands Fish Ruin 4 (Grumpy Hank)
Complete Grumpy Hank Quest 4
Perfect timing if you’re saving for Rukiry Tube
Stack rewards with equipment farming
Late Game (Level 30+)
5. Spirit Roots Fish Ruin 5 (Isaac’s Dome)
Complete Victor Quest 4
Requires Oxy Tube minimum ($50,000)
Major XP boost for late-game leveling
6. Spirit Roots Fish Ruin 6 (Tunnel Below Isaac)
Complete Victor Quest 7
Same equipment requirements as 5
Can be done in the same diving session
7. Spirit Roots Fish Ruin 7 (King Cat Cave)
Complete Golem Quest 2
Save this for last to complete the Crab quest
Use Lost Spirit Tube ($200,000) for comfortable exploration
Pro Progression Strategy
My Recommended Approach:
Focus on Kraken’s main quest chain (Quests 1-8) first
Complete Mr. Black’s quests alongside Kraken’s for extra keys
Unlock Scientist’s Teleporter before going to Ancient Sands
Farm Ancient Sands fish while completing Marcus and Grumpy Hank quests
Save Spirit Roots ruins until you have proper equipment ($100,000+ investment)
Complete all 7 ruins before returning to Crab for the artifact
Fish Ruin Rewards Breakdown
Let me break down exactly what you can expect from each Fish Ruin chest. Rewards scale with biome difficulty and depth.
Ocean (Forgotten Deep) Rewards
Average per chest:
Cash: $1,500 – $3,000
Star Shards: 5-10
Oxygen Pods: 2-3
Potions: 1-2 (Speed or Cash boost)
XP: 500-1,000
Total from both Ocean ruins: ~$5,000 cash, 15-20 Star Shards
Ancient Sands Rewards
Average per chest:
Cash: $5,000 – $8,000
Star Shards: 10-15
Oxygen Pods: 3-4
Potions: 2-3 (various types)
XP: 1,500-2,500
Total from both Ancient Sands ruins: ~$13,000 cash, 25-30 Star Shards
Spirit Roots Rewards
Average per chest:
Cash: $12,000 – $20,000
Star Shards: 15-20
Oxygen Pods: 4-5
Potions: 3-4 (XP and Cash boost priority)
XP: 3,000-5,000
Total from three Spirit Roots ruins: ~$50,000 cash, 50-60 Star Shards
Grand Total Rewards
Opening all 7 Fish Ruins provides:
Total Cash: ~$70,000
Total Star Shards: 90-110
Total Oxygen Pods: 25-35
Total Potions: 15-20
Total XP: 15,000-25,000
Plus the Crab Claw artifact if you complete the Crab quest!
Common Mistakes to Avoid
After helping countless players with Fish Ruins, here are the mistakes I see most often:
Mistake 1: Attempting Ruins Without Proper Equipment
The Problem: Players try to reach deep Fish Ruins with inadequate tubes.
The Solution:
Ocean ruins: Pufferfish Tube minimum ($2,850)
Ancient Sands ruins: Rukiry Tube minimum ($40,500)
Spirit Roots ruins: Oxy Tube minimum ($50,000)
Why It Matters: Running out of oxygen = death = losing fish and cash. Always bring spare Oxygen Pods.
Mistake 2: Using Keys in the Wrong Order
The Problem: Opening the “easiest to reach” ruins first wastes early progression boosts.
The Solution: Follow the optimal order I outlined above. Save harder ruins for when you have better equipment and need bigger rewards.
Mistake 3: Forgetting to Get the Crab Scroll
The Problem: Players open all 7 ruins, then discover they needed the Crab quest first.
The Solution: Get the Crab Scroll early (it’s in Ancient Sands) and accept the quest before opening ruins. This ensures you get credit for all 7.
Mistake 4: Not Buying the Radar
The Problem: Mr. Black’s quests become nearly impossible without the Radar.
The Solution: Buy the Radar from Richard for $250 before attempting Mr. Black Quest 8. It shows fish mutations and makes the quest trivial.
Mistake 5: Dying With Valuable Fish
The Problem: Players attempt difficult ruins while carrying expensive fish in their inventory.
The Solution: Use Billy’s Bank to store valuable fish before risky dives. Death means losing both cash AND fish.
Advanced Tips for Fish Ruin Hunting
Want to maximize your Fish Ruin rewards? Here are my pro strategies:
Tip 1: Stack Quests for Maximum Efficiency
The Strategy: Complete multiple NPC quests simultaneously.
Example:
Accept Kraken Quest 5
Accept Mr. Black Quest 3
Accept Virelia’s geode quest
Fish in the same area to progress all three quests
Result: Earn multiple rewards (including Fish Ruin keys) from a single diving session.
Tip 2: Use Potions Before Opening Ruins
The Strategy: Activate XP or Cash boost potions before opening Fish Ruin chests.
Why It Works: The XP and cash from ruins gets multiplied by your active potion effects.
Best Potions to Use:
XP Potion (2x XP for 10 minutes)
Cash Potion (1.5x cash for 15 minutes)
Tip 3: Farm Star Shards Between Ruins
The Strategy: Use Star Shards from early ruins to do Lucky Pulls for better races.
Optimal Path:
Open Ocean ruins (15-20 Star Shards)
Use shards for 1-2 Lucky Pulls
Continue with better race passive abilities
Ancient Sands ruins become easier with better stats
Tip 4: Complete Scientist’s Teleporter Quest First
The Strategy: Unlock fast travel before exploring distant ruins.
Why It’s Crucial:
Saves massive amounts of time
Reduces oxygen consumption
Allows easy access to all biomes
Necessary for efficient Fish Ruin hunting
Teleporter Quest Requirements:
Toilet Paper
Toilet
Door
Power Relays
Tip 5: Bring Backup Oxygen Pods
The Strategy: Always carry 5-10 extra Oxygen Pods when hunting distant ruins.
Cost-Benefit Analysis:
Oxygen Pods: ~$100 each
Lost fish/cash from death: Potentially thousands
Risk vs. Reward: Always bring backups
Frequently Asked Questions
Can you open Fish Ruins multiple times?
No, each Fish Ruin chest can only be opened once per player. Once you claim the rewards, that chest is permanently empty. There’s no respawn timer or way to get the loot again.
Do I need all the keys before starting?
No, you can collect keys and open ruins gradually. However, I recommend getting the Crab Scroll and accepting the Crab quest before opening your first ruin, so you get credit for all 7 ruins toward the Crab Claw artifact reward.
What happens if I lose a Fish Ruin key?
You cannot lose keys in Abyss – they’re permanently added to your inventory once earned from NPC quests. Keys are not dropped on death, so you’re safe to explore dangerous areas after obtaining them.
Which Fish Ruin gives the best rewards?
The Spirit Roots ruins (especially Fish Ruin 7 near King Cat) provide the best individual rewards with $15,000-$20,000 cash, 15-20 Star Shards, and 3,000-5,000 XP. However, early Ocean ruins are better for progression since you can open them sooner.
Can I get Fish Ruin keys without doing quests?
No, Fish Ruin keys are exclusively obtained by completing specific NPC quest chains. There’s no alternative method to acquire keys – you must complete the required quests listed in this guide.
Is the Crab Claw artifact worth it?
Absolutely! The Crab Claw artifact is one of the best fishing artifacts in Abyss, providing bonuses to catch rate, fish value, and weight capacity. If you’re planning to farm fish for profit (which you should be), this artifact pays for itself quickly.
What level should I be to open all Fish Ruins?
Ocean ruins: Level 10-15
Ancient Sands ruins: Level 20-30
Spirit Roots ruins: Level 35-45
However, level isn’t as important as having the proper equipment. Focus on getting the right tubes and guns rather than just leveling up.
Do Fish Ruins respawn after server resets?
No, Fish Ruins are tied to your player data, not the server. Even if you join a new server or the game resets, opened ruins stay opened. This is account-based progression, not server-based.
Can I help my friends open their Fish Ruins?
You cannot directly help friends open ruins (everyone needs their own keys), but you can guide them to ruin locations, help them complete NPC quests to get keys, and provide backup during dangerous dives to deep ruins.
What’s the fastest way to get all 7 Fish Ruin keys?
Focus on completing the main quest chains for each biome’s primary NPCs:
Kraken & Mr. Black (Ocean) – 5-7 hours
Marcus & Grumpy Hank (Ancient Sands) – 8-12 hours
Victor & Golem (Spirit Roots) – 12-18 hours
Total time: 25-37 hours of focused questing. This can be reduced by efficiently stacking multiple quest objectives.
Essential NPCs for Fish Ruin Quests
Here’s a quick reference guide for all the NPCs involved in Fish Ruin key acquisition:
Ocean (Forgotten Deep) NPCs
Kraken
Location: Center of Forgotten Deep safe dome
Role: Main quest giver, fish buyer
Key Provided: Forgotten Key (Quest 5)
Other Services: Buys all fish for cash
Mr. Black
Location: Near the edges of Forgotten Deep safe dome
Role: Mutation specialist quests
Key Provided: Forgotten Key (Quest 8)
Quest Tip: Requires catching fish with specific mutations
Scientist
Location: Next to portable restroom in Forgotten Deep
Role: Teleporter quest giver
Importance: Unlock fast travel before hunting distant ruins
Ancient Sands NPCs
Marcus
Location: Archaeological site in Ancient Sands
Role: Primary Ancient Sands questgiver
Key Provided: Ancient Key (Quest 5)
Related NPCs: Works with Naomi and Noah (archaeologists)
Grumpy Hank
Location: Building west of Crazy Jeff’s Store
Role: Quest giver and Tube merchant
Key Provided: Ancient Key (Quest 4)
Sells: Rukiry Tube ($40,500) – essential for deep diving
Crazy Jeff
Location: Cave under the big rock arch
Role: General merchant
Sells: Minimap and various supplies
Note: Not required for keys but useful for navigation
Spirit Roots NPCs
Victor
Location: Behind barrier in back area of Spirit Roots
Role: Late-game quest giver
Keys Provided: Spirit Key (Quest 4 and Quest 7)
Prerequisite: Complete Isolde’s quest chain first
Golem
Location: Eastern area of Spirit Roots
Role: Quest giver
Key Provided: Spirit Key (Quest 2)
Note: Distinctive large stone NPC, hard to miss
Isolde
Location: Front area of Spirit Roots safe dome
Role: Barrier unlock quest chain
Importance: Must complete her quests to access Victor
Isaac
Location: Spirit Roots safe dome entrance
Role: Quest giver
Note: Fish Ruin 5 is literally on top of his dome
Special NPCs
Crab
Location: Requires finding Crab Scroll in Ancient Sands first
My Advice: Don’t rush to open all ruins immediately. Progress naturally through the biomes, upgrade your equipment, and open ruins as you can safely reach them.
Fish Ruin Hunting Checklist
Use this checklist to track your progress toward opening all 7 Fish Ruins:
Pre-Hunt Preparation
☐ Complete tutorial and reach level 10+
☐ Purchase Radar from Richard ($250)
☐ Complete Scientist’s Teleporter quest
☐ Buy appropriate tubes for each biome
☐ Stock up on Oxygen Pods (20+ recommended)
☐ Find Crab Scroll in Ancient Sands
☐ Accept Crab quest to open all 7 ruins
Ocean Keys & Ruins
☐ Complete Kraken Quest 5 → Forgotten Key
☐ Open Fish Ruin 1 (Behind Virelia)
☐ Complete Mr. Black Quest 8 → Forgotten Key
☐ Open Fish Ruin 2 (Scientist/Lost Captain area)
Ancient Sands Keys & Ruins
☐ Complete Marcus Quest 5 → Ancient Key
☐ Open Fish Ruin 3 (Behind Suspicious Fisher)
☐ Complete Grumpy Hank Quest 4 → Ancient Key
☐ Open Fish Ruin 4 (Beside Grumpy Hank tower)
Spirit Roots Keys & Ruins
☐ Complete Isolde’s quest chain (unlock Victor access)
☐ Complete Victor Quest 4 → Spirit Key
☐ Open Fish Ruin 5 (On top of Isaac’s dome)
☐ Complete Victor Quest 7 → Spirit Key
☐ Open Fish Ruin 6 (Tunnel below Isaac)
☐ Complete Golem Quest 2 → Spirit Key
☐ Open Fish Ruin 7 (King Cat cave)
Final Reward
☐ Return to Crab NPC
☐ Claim Crab Claw artifact + rewards
☐ Equip Crab Claw for fish farming boost
Conclusion
Finding and opening all 7 Fish Ruins in Abyss is one of the most rewarding progression milestones in the game. Not only do you gain massive amounts of cash, Star Shards, and XP, but completing the Crab quest rewards you with the powerful Crab Claw artifact.
Quick Recap:
7 total Fish Ruins across three biomes (Ocean, Ancient Sands, Spirit Roots)
Each ruin requires a biome-specific key from NPC quests
Rewards scale with depth and difficulty (~$70,000 total cash + 90-110 Star Shards)
Opening all 7 unlocks the Crab Claw artifact (Legendary)
Proper equipment is essential – don’t rush into deep ruins unprepared
Remember: Fish Ruins are one-time rewards. Plan your route carefully, use the optimal order I’ve provided, and make sure you’ve accepted the Crab quest before opening your first ruin. With the right preparation and this complete guide, you’ll have all 7 Fish Ruins unlocked and the Crab Claw artifact in your inventory.
Now get out there and start hunting those ruins! The treasures of the Abyss await you beneath the waves.
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