How to Catch Blue Sea Slug in Fisch
SecretC$ 10,531/kg•Luminescent Cavern
Only from Crab Cages
You cannot catch the Blue Sea Slug with a rod: the Fisch Wiki lists it only in Crab Cages, at Luminescent Cavern (checked 2026-10-11).
Where
Luminescent Cavern
When
Crab Cages
Weather
Foggy
Avg Sale
C$ 4,739
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Spawn Locations
How to Catch It
Only from Crab Cages (Luminescent Cavern), best in Winter, in Foggy weather, at night; put Weird Algae bait in the cage.
- Bait it prefers
- Weird Algae
- Rod
- No rod: Crab Cages onlyAny bait you hold goes into the cage
- Reeling
- No reeling: the cage catches it
- XP per catch
- 7,370 before bonuses
From the Blue Sea Slug's page on the Fisch Wiki, checked October 11, 2026. No fish needs a minimum Luck: Luck only raises your chance of the rarer fish in a pool.
NPC Sell Value
Price and weight checked 2026-10-11. Wiki source. Player trade prices may differ.
NPC price per kg
C$ 10,531/kg
Natural weight range
0.2-1.47 kg
Average catch
C$ 4,739
With Tryhard mutation (10x): C$ 47,391
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Spawn Conditions
- Time
- Night
- Weather
- Foggy
- Season
- Winter
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