Abyss Fish Ruins & Keys Guide (March 2026) Complete Walkthrough

Updated by Marcus Reed
February 13, 2026
GamingRoblox

Welcome to the most comprehensive guide on All Fish Ruins and Keys in Abyss! As an experienced Abyss explorer, I’ve spent countless hours diving through the mysterious underwater world, uncovering every secret, and mastering the art of fish ruin hunting. This guide will walk you through everything you need to know about these mysterious underwater shrines, their keys, and the incredible rewards that await.

Quick Overview: Fish Ruins at a Glance

Aspect	Details
Total Fish Ruins	7 across all biomes
Biomes with Ruins	Ocean (2), Ancient Sands (2), Spirit Roots (3)
Key Types	Forgotten Key, Ancient Key, Spirit Key
Special Reward	Crab Claw Artifact
Requirements	Complete specific NPC quests
Best Time to Hunt	After reaching level 20+

Understanding Fish Ruins in Abyss

Fish ruins are mysterious underwater shrines scattered throughout the three main biomes of Abyss. These ancient structures contain locked treasure chests that hold valuable rewards including cash, star shards, oxygen pods, and potions. What makes them special is that they’re not just random loot containers – they’re part of a larger quest system that culminates in one of the game’s most powerful artifacts.

Why Fish Ruins Matter

From my experience exploring Abyss, fish ruins serve multiple crucial purposes in your progression journey:

Massive XP Boosts: Each ruin chest grants substantial experience points, making them ideal for leveling up quickly
Valuable Resources: The chests contain essential items like oxygen pods and potions that are crucial for deep dives
Artifact Progression: Opening all 7 ruins unlocks the Crab Claw artifact, a game-changing piece of equipment
Quest Completion: Many advanced quests and achievements require fish ruin exploration

Complete Fish Ruins Locations Guide

Ocean Biome Fish Ruins (2 Ruins)

The Ocean biome, being the starting area, contains two easily accessible fish ruins that are perfect for beginners.

Fish Ruin #1: Behind Virelia

Location: Directly behind the Virelia NPC on top of a rock structure
Depth: Surface level (0-50m)
Key Required: Forgotten Key
Best Access Method: Complete tutorial, then swim directly behind Virelia’s shop
Pro Tip: This is often the first ruin players discover. The chest is visible from the surface, making it easy to locate.

Fish Ruin #2: Between Scientist and Lost Captain

Location: Midpoint between the Scientist and Lost Captain NPCs
Depth: 200m+ (requires appropriate tube)
Key Required: Forgotten Key
Best Access Method: Use the teleporter after completing Scientist’s quest, then dive east
Warning: This location requires proper oxygen management. I recommend having at least the Oxy Tube or better before attempting.

Ancient Sands Biome Fish Ruins (2 Ruins)

The Ancient Sands biome presents more challenging ruins with greater rewards.

Fish Ruin #3: Behind Suspicious Fisher

Location: On top of a rock tower directly behind the Suspicious Fisher NPC
Depth: 120-150m
Key Required: Ancient Key
Best Access Method: Complete Marcus’s quests to unlock the area, then head west from the main entrance
Pro Tip: The Suspicious Fisher sells valuable items, so combine your ruin visit with shopping.

Fish Ruin #4: Beside Grumpy Hank Tower

Location: On top of a rock structure next to Grumpy Hank’s tower
Depth: 180-220m
Key Required: Ancient Key
Best Access Method: Complete Grumpy Hank’s quests first, then explore the surrounding area
Strategy: This ruin is often overlooked by players, making it less crowded during peak hours.

Spirit Roots Biome Fish Ruins (3 Ruins)

Spirit Roots contains the most ruins and the most challenging ones, designed for advanced players.

Fish Ruin #5: Isaac’s Safety Dome

Location: Right in front of the Isaac NPC, on top of the safety dome
Depth: 350m+ (requires advanced tube)
Key Required: Spirit Key
Best Access Method: Use Isaac as your landmark – the ruin is impossible to miss
Pro Tip: This is the easiest Spirit Roots ruin to locate, making it perfect for your first visit to the biome.

Fish Ruin #6: Isaac’s Tunnel

Location: Inside the tunnel directly below the Isaac NPC
Depth: 400m+
Key Required: Spirit Key
Best Access Method: Look for the treasure chest icon on your map near Isaac, then dive down
Warning: This tunnel can be disorienting. I recommend bringing extra oxygen pods.

Fish Ruin #7: Golem’s Cave

Location: Inside the Spirit Roots cave east of the Golem NPC, just before the King Cat entrance
Depth: 450m+ (endgame content)
Key Required: Spirit Key
Best Access Method: Complete Golem’s quests first, then explore the cave system
Pro Strategy: This is the final ruin most players open, and it’s often the most rewarding.

Complete Keys Guide: How to Get Every Fish Ruin Key

Getting keys for fish ruins requires completing specific NPC quests. Here’s my detailed breakdown of each key and how to obtain it:

Forgotten Keys (Ocean Biome)

Kraken’s Forgotten Key

NPC: Kraken (Main quest giver)
Quest Required: Quest #5
Difficulty: Medium
Time Investment: 2-3 hours
Pro Tips:
- Complete quests 1-4 first to build up your equipment
- Stock up on oxygen pods before attempting
- The Kraken’s quests involve catching specific fish, so check your fish guide beforehand

Mr. Black’s Forgotten Key

NPC: Mr. Black (Mutation expert)
Quest Required: Quest #8
Difficulty: Hard
Time Investment: 4-5 hours
Pro Tips:
- This questline requires rare fish mutations
- Save your best mutated fish for this quest
- Consider completing during double XP events if available

Ancient Keys (Ancient Sands Biome)

Marcus’s Ancient Key

NPC: Marcus (Ancient Sands guide)
Quest Required: Quest #5
Difficulty: Medium
Time Investment: 2-3 hours
Pro Tips:
- Marcus’s quests often involve exploration
- Bring a good tube for deeper waters
- Complete the Scientist’s teleporter quest first for easier access

Grumpy Hank’s Ancient Key

NPC: Grumpy Hank (Tower keeper)
Quest Required: Quest #4
Difficulty: Easy-Medium
Time Investment: 1-2 hours
Pro Tips:
- Grumpy Hank’s quests are usually straightforward
- The tower area has good fishing spots
- Combine this with tube upgrades from David

Spirit Keys (Spirit Roots Biome)

Victor’s Spirit Keys

NPC: Victor (Spirit Roots guardian)
Quests Required: Quest #4 AND Quest #7
Difficulty: Hard
Time Investment: 5-6 hours total
Pro Tips:
- Victor gives you TWO Spirit Keys for these quests
- Quest #7 is significantly harder than #4
- These quests require endgame equipment
- Consider completing other Spirit Roots quests first

Golem’s Spirit Key

NPC: Golem (Ancient guardian)
Quest Required: Quest #2
Difficulty: Medium-Hard
Time Investment: 3-4 hours
Pro Tips:
- Golem’s quests involve combat elements
- Bring your best gun/harpoon
- The cave system can be confusing – use your map frequently

Advanced Strategies for Fish Ruin Hunting

Based on my extensive experience, here are some pro strategies that most guides miss:

Optimal Route Planning

Start with Ocean ruins – they’re easiest and give you practice
Progress to Ancient Sands – midgame content with good rewards
End with Spirit Roots – save the hardest for last when you’re fully equipped

Resource Management

Always bring extra oxygen pods – ruins are often deeper than expected
Stock up on speed potions for faster travel between ruins
Keep repair kits handy for tube damage in deeper areas

Timing Strategies

Play during off-peak hours – fewer players competing for ruins
Check for double XP events – maximize your gains
Weekday mornings are typically the quietest times

Equipment Optimization

From my testing, here’s the best equipment setup for ruin hunting:

Equipment Slot	Recommended Item	Why
Tube	Eternal Tube or better	Maximum depth and oxygen
Gun	Crossbow or Plunger Gun	Good damage for guardian fights
Artifacts	Crab Claw + Holy Flower + Eternal Crystal	Perfect balance of stats
Consumables	Speed Potions + Oxygen Pods	Emergency resources

The Crab Claw Artifact: Ultimate Reward

Opening all 7 fish ruins unlocks the Crab Claw artifact, one of the most powerful items in Abyss. Here’s everything you need to know about this incredible reward:

Crab Claw Stats

Oxygen Increase: 22% → 29% (at max level)
Cooldown Reduction: -0.14s → -0.28s
Cash Bonus: +12% → +19%
Rarity: Quest Artifact
Slot Requirement: 1 artifact slot

How to Unlock the Crab Claw

Open all 7 fish ruins using their respective keys
Find the Crab NPC in Forgotten Deep (requires special scroll)
Complete Crab’s quest chain by showing proof of all ruins
Receive the Crab Claw as your reward

Why the Crab Claw is Game-Changing

In my experience, the Crab Claw artifact transforms your gameplay:

Longer dives with increased oxygen capacity
Faster ability usage with reduced cooldowns
More money from all activities
Perfect for deep exploration and endgame content

Pro Tips for Crab Claw Optimization

Level it up quickly – the stat increases are significant
Combine with oxygen-focused artifacts for maximum depth
Use during money-making sessions for increased profits
Essential for endgame zones and legendary fish hunting

Common Mistakes to Avoid

After helping dozens of players with fish ruins, I’ve identified these common mistakes:

Beginner Mistakes

Not bringing enough oxygen – ruins are deeper than they appear
Wrong key type – Forgotten keys don’t work in Ancient Sands
Skipping NPC quests – you can’t get keys without quest completion
Ignoring equipment requirements – endgame ruins need endgame gear

Intermediate Mistakes

Wasting keys on wrong ruins – each key type is biome-specific
Not checking map coordinates – some ruins are hard to spot visually
Poor resource management – running out of oxygen mid-dive
Missing optimal quest order – some quests unlock better routes

Advanced Mistakes

Not optimizing artifact combinations – Crab Claw needs proper support
Ignoring event bonuses – double XP events make ruin hunting more profitable
Poor timing – crowded servers mean competition for ruins
Not preparing for Crab quest – the scroll can be hard to find

Troubleshooting Guide

Can’t Find a Ruin?

Check your map – ruins appear as chest icons
Look for rock formations – most ruins are on elevated structures
Check depth requirements – some ruins are deeper than expected
Ask in community Discord – other players can provide coordinates

Key Not Working?

Verify key type – Forgotten/Ancient/Spirit keys are biome-specific
Check quest completion – ensure you’ve finished the required quest
Contact support – rare bugs can prevent key usage
Try relogging – sometimes fixes key issues

Can’t Access Crab NPC?

Find the scroll first – located in Ancient Sands cave behind Grumpy Hank’s tower
Complete all ruins – Crab won’t appear until all 7 are opened
Check quest requirements – some prerequisites may apply
Join official Discord – get help from experienced players

Frequently Asked Questions

How many fish ruins are there in Abyss?

There are exactly 7 fish ruins total: 2 in Ocean, 2 in Ancient Sands, and 3 in Spirit Roots.

Can you reclaim fish ruin rewards?

No, once you open a fish ruin chest, you cannot reclaim its rewards again. This makes each opening a permanent decision.

What’s the best order to open fish ruins?

I recommend: Ocean ruins first (easiest), then Ancient Sands (midgame), finally Spirit Roots (endgame content).

Do fish ruins reset?

Fish ruins do not reset – once opened, they remain open permanently. This is why planning your approach is crucial.

What level should I be for fish ruins?

Ocean ruins: Level 10+
Ancient Sands ruins: Level 15+
Spirit Roots ruins: Level 25+

Can I get fish ruin keys without quests?

No, all fish ruin keys require completing specific NPC quests. There are no alternative methods to obtain keys.

Is the Crab Claw artifact worth it?

Absolutely! The Crab Claw is one of the best artifacts in Abyss, providing essential stats for endgame content.

What happens if I lose a key?

Keys are permanent items in your inventory once obtained. You cannot lose them through normal gameplay.

Can I trade fish ruin keys?

No, fish ruin keys are soulbound and cannot be traded between players.

Do fish ruins contain exclusive fish?

Fish ruins contain treasure chests with rewards, not fish. However, the areas around ruins often have good fishing spots.

Conclusion

Mastering fish ruins in Abyss is a journey that rewards preparation, patience, and perseverance. Through my extensive exploration, I’ve found that these mysterious shrines offer some of the best rewards in the game, culminating in the incredible Crab Claw artifact.

Remember that proper planning is key – make sure you have the right equipment, sufficient supplies, and completed prerequisite quests before attempting each ruin. The journey through all 7 ruins will test your skills but reward you with some of the best gear and resources available in Abyss.

Bookmark this guide and check back regularly for updates as new content and strategies emerge. The underwater world of Abyss is constantly evolving, and staying informed will keep you ahead of the competition.

Happy diving, and may your treasure hunting be fruitful! 🦀✨

Related Resources

For more comprehensive Abyss guides, check out these excellent resources:

All Abyss Roblox NPCs Guide – Complete NPC locations and quests
Abyss Artifacts Guide – Master the artifact system
All Tubes in Abyss Roblox – Find the perfect tube for deep diving
Abyss Chest Locations Guide – Discover all treasure chests
Abyss Badges & Achievements Guide – Complete all challenges