TL;DR
- Gleebeous mutation fish exclusively spawn at Roslit Bay coordinates -1441.2, 133, 262.9
- Use rods with high lure percentages – Dreambreaker (120%) or Fabulous (100%) for fastest results
- Fish Radar shows mutation zones in light green; cannot obtain through appraising
- Prepare gear and consumables before heading to location to maximize efficiency
- Complete Dr Crookspine questline to unlock Blade of Glorp fishing rod
Fisch’s recent Glorp Alien expansion introduces compelling new content including a mysterious NPC and engaging questline that sets the stage for the upcoming Fischmas celebration. While anticipating the major event and collecting daily Advent calendar rewards, players can pursue this specialized mission to acquire the Gleebeous mutation for Dr Crookspine. This unique biological alteration represents a crucial gameplay element that veteran anglers shouldn’t overlook.
The Gleebeous mutation serves as an essential component for obtaining the prestigious Blade of Glorp fishing rod within Fisch’s ecosystem. This extraterrestrial genetic modification manifests exclusively in aquatic life inhabiting specific regions affected by the UFO incident. Understanding its mechanics and acquisition methods will significantly enhance your fishing proficiency and gear progression.
The singular source for obtaining fish with Gleebeous characteristics remains the aquatic environments surrounding Roslit Bay. The precise angling coordinates read: -1441.2, 133, 262.9, which players can efficiently locate using Fisch’s integrated GPS navigation. This positioning indicates that both shorelines adjacent to the wrecked extraterrestrial vessel potentially harbor fish carrying this distinctive mutation.
As an additional localization method, activating the Fish Radar functionality will highlight this territory. Areas densely populated with Gleebeous mutated specimens appear illuminated in pale green hues, mirroring the otherworldly glow emanating from the UFO. Thus, equip your premium rod and commence fishing operations in this sector.
Remember that angling within this designated zone comprises the sole method for acquiring Gleebeous mutated fish, rendering Appraiser attempts futile—conserving your currency and totems for more productive applications.

Now that you’ve mastered the Gleebeous mutation fishing grounds, evaluating which rods accelerate capture rates becomes paramount. Through extensive field testing and statistical analysis, we’ve determined these fishing implements deliver superior performance for this specific objective:
For intermediate anglers, focusing on rods without inherent passive mutations frequently yields accelerated results for this particular endeavor. The mutation’s unique properties respond optimally to clean statistical profiles rather than compounded ability stacks.
Successful Gleebeous mutation acquisition demands strategic preparation beyond mere location knowledge. Seasoned players recommend stocking specialized bait and durability enhancements before embarking on fishing expeditions. The remote location means wasted trips cost valuable gameplay hours—come fully equipped with repair materials and buff consumables.
Avoid these frequent errors: attempting to appraise standard fish into mutated variants (impossible), using area-appropriate but mutation-ineffective rods, and neglecting to activate Fish Radar for precision targeting. Proper execution typically yields mutations within 15-30 minutes using optimized gear, whereas subpar equipment may require hours of frustrating attempts.
For comprehensive gameplay mastery, consult our Complete Guide for foundational strategies that complement specialized fishing techniques.
Action Checklist
- Navigate to Roslit Bay coordinates -1441.2, 133, 262.9 using GPS
- Activate Fish Radar to identify light green mutation zones
- Equip Dreambreaker Rod (120% Lure) or Fabulous Rod (100% Lure)
- Fish continuously for 15-30 minutes for mutation acquisition
- Deliver mutated fish to Dr Crookspine for Blade of Glorp unlock
No reproduction without permission:Tsp Game Club » How to Get Gleebous Mutation in Fisch Complete guide to finding Gleebeous mutation fish and optimizing your fishing strategy in Fisch's alien update
