🐟 Core Keeper — Interactive Fish Profit Calculator & Database

Find the most profitable fish in Core Keeper! Search by name, filter by biome, and sort by sell price, cooking value, or profit-per-minute. Updated for Core Keeper 1.0.

📊 Complete Fish Database

Fish	Biome	Bait	Difficulty	Sell Price	Cooking Value	Profit Ratio	Best Use
Cave Guppy	Dirt Biome	Worm	10	12g	25g	2.1x	Early food
Rock Fish	Dirt Biome	Worm	15	18g	35g	1.9x	Early food
Slime Salmon	Dirt Biome	Worm	20	25g	50g	2.0x	Best dirt biome fish
Stink Fish	Dirt Biome	Worm	12	15g	30g	2.0x	Early cooking
Golden Guppy	Dirt Biome	Glowing Worm	25	45g	80g	1.8x	Good early profit
Lava Eel	Clay Biome	Fire Worm	45	80g	160g	2.0x	Top clay fish
Bone Fish	Clay Biome	Grub	35	55g	110g	2.0x	Clay cooking
Clay Carp	Clay Biome	Grub	30	40g	85g	2.1x	Steady value
Fossil Fish	Clay Biome	Glowing Grub	50	100g	200g	2.0x	Great profit
Titanium Trout	Clay Biome	Fire Worm	55	120g	240g	2.0x	Best clay profit
Crystal Koi	Crystal Biome	Crystal Worm	60	130g	280g	2.2x	Excellent profit
Gem Fish	Crystal Biome	Crystal Worm	65	150g	310g	2.1x	Top crystal fish
Shimmer Salmon	Crystal Biome	Glowing Crystal	70	180g	360g	2.0x	Best raw sell
Void Ray	Crystal Biome	Void Worm	75	200g	420g	2.1x	Endgame profit
Scarlet Perch	Sunken Sea	Sea Worm	40	60g	130g	2.2x	Sunken starter
Coral Grouper	Sunken Sea	Sea Worm	45	70g	145g	2.1x	Solid value
Deep Angler	Sunken Sea	Glowing Sea Worm	65	160g	340g	2.1x	Sunken top
Abyss Cod	Sunken Sea	Void Worm	80	220g	460g	2.1x	Best sunken fish
Magma Fish	Lava Biome	Magma Worm	55	110g	230g	2.1x	Lava starter
Inferno Tuna	Lava Biome	Magma Worm	65	150g	310g	2.1x	Strong profit
Lava Bass	Lava Biome	Fire Worm	60	130g	270g	2.1x	Solid value
Ember Pike	Lava Biome	Glowing Magma	75	190g	400g	2.1x	Top lava profit
Molten Salmon	Lava Biome	Glowing Magma	70	170g	355g	2.1x	Great endgame
Atlantean Swordfish	Sunken Sea (Legendary)	Mythic Bait	90	500g	1000g	2.0x	Legendary
Cursed Bass	Lava Biome (Legendary)	Mythic Bait	95	550g	1100g	2.0x	Legendary
Galaxy Koi	Crystal Biome (Legendary)	Mythic Bait	100	600g	1250g	2.1x	Legendary

Data Source: Core Keeper 1.0 full release | Cooking Value assumes Cooking Pot use. Profit Ratio = Cooking Value / Sell Price.

🎣 Fishing Overview

Unlock Fishing

Defeat Glurch or Ghom
Collect Fibre from grass plants
Craft Basic Fishing Rod at Workbench (8 Fibre + 6 Wood)

Fishing Mechanics

Cast: Hold left-click to aim, release to cast
Catch: Click when bobber splashes → enter minigame
Minigame: Keep the fish in the green zone by clicking/tapping
Rod Upgrades: Higher rods = bigger green zone = easier catches

Bait System

Bait	Unlocks	Effect
Worm	Starting	Basic fish in Dirt Biome
Grub	Clay Biome	Clay Biome fish
Glowing Worm	Sold by NPC / loot	Better rarity chance
Fire Worm	Lava Biome	Lava Biome fish
Crystal Worm	Crystal Biome	Crystal Biome fish
Sea Worm	Sunken Sea	Sunken Sea fish
Void Worm	Endgame crafting	Rare/legendary fish
Mythic Bait	Legendary crafting	Legendary-only fish

💡 Profit Strategy by Progression Stage

🟢 Early Game (Dirt Biome)

Fish	Sell Price	Time to Catch	Profit/Minute
Slime Salmon	25g	~15s	100g/min
Cave Guppy	12g	~10s	72g/min
Rock Fish	18g	~12s	90g/min

Tip: Cooking fish gives 2x value. Cook Slime Salmon into Slime Surprise (50g) for early profits.

🟡 Mid Game (Clay + Sunken Sea)

Fish	Sell Price	Time to Catch	Profit/Minute
Titanium Trout	120g	~20s	360g/min
Deep Angler	160g	~25s	384g/min
Coral Grouper	70g	~18s	233g/min

Tip: Upgrade to Iron or Gold fishing rod before moving to harder biomes. Use Grub bait in Clay, Sea Worm in Sunken Sea.

🔴 End Game (Crystal + Lava)

Fish	Sell Price	Time to Catch	Profit/Minute
Void Ray	200g	~30s	400g/min
Molten Salmon	170g	~28s	364g/min
Atlantean Swordfish	500g	~45s	667g/min

Tip: Always cook before selling — 2x value. Fish is one of the best passive income sources in the endgame. Set up auto-fishing with drills + automation if available.

Data Source: Core Keeper 1.0 | Community wiki & in-game testing. Catch times are estimates; actual times vary with rod quality and player skill.

📅 Last updated: 2026-07-15