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Gleebous Mutation in Fisch: Exact Location and Fastest Way to Farm It

Fish around the crashed UFO at -1441.2, 133, 262.9 in Roslit Bay, using Mutated and a fast rod to farm the Gleebous mutation.
WorldFisch: Exact Location and Fastest Way to Farm It Length4 min Posted Quest giverVGSources Team
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The Gleebous mutation can be caught only in the water surrounding the crashed UFO in Roslit Bay. Use GPS to reach -1441.2, 133, 262.9, cast on either side of the UFO, and repeat catches until the mutation appears. For the best farming speed, use a rod with the Mutated enchant and prioritize high Lure and Progress Speed.

Gleebous mutation location in Fisch

Travel to the crashed UFO in Roslit Bay and fish in the surrounding water. The most specific reported coordinates for the Gleebous pool are:

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-1441.2, 133, 262.9

The valid fishing water is on both sides of the UFO crash site. If you use Fish Radar, look for the light-green overlay around the UFO and cast inside that highlighted area. Nearby water outside the highlighted pool may not count.

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You can navigate there in either of two ways:

  1. Open the in-game GPS and enter or follow -1441.2, 133, 262.9.
  2. Travel to Roslit Bay and locate the crashed UFO manually, then fish directly around it.

Do not confuse the hotspot with the broader Roslit Bay coordinate -1450, 135, 750. That coordinate identifies the region, but the reported Gleebous fishing location is the more precise UFO-area pool. Beebom and All Things How both identify the crashed-UFO waters as the relevant location.

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What Gleebous is—and what it is not

Gleebous is a mutation applied to a fish you catch, not a separate fish species. Keep fishing in the UFO pool and check each catch for the Gleebous result.

The location restriction matters: the retrieved guides state that fish caught elsewhere do not roll Gleebous. Fishing somewhere else in Roslit Bay, or at a different island, is not a substitute for fishing beside the UFO.

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Fastest farming setup

1. Put Mutated on your rod

The most consistently supported optimization is to apply the Mutated enchant to a suitable rod before farming. The enchant is described as increasing mutation rolls, and it does not require a specific endgame rod.

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To obtain it, acquire standard enchant relics and use them as needed through the game’s enchant system. The available guides state that relics can be purchased from Merlin if necessary, then applied until the rod receives Mutated. Exact shop labels and button paths can change, so use the current in-game prompts rather than relying on an old menu name.

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2. Choose speed over maximum fish value

For mutation farming, the goal is to create as many catch attempts as possible. Prioritize:

  • High Lure: reduces the time spent waiting for a bite.
  • High Progress Speed: helps finish catches faster.
  • Mutated: improves the mutation-focused setup described by the guides.

Named rod options reported by the guides include:

Rod Reported strengths Availability note
Fabulous Rod 100% Lure Reported for level-1000-plus players who completed the Fabulous Deity quests.
Dreambreaker Rod 120% Lure and a Progress Speed boost A strong speed-oriented option when available to you.
Wind Elemental Rod 555% Lure and a 50% Progress Speed boost The strongest listed speed option in the retrieved guides.

You do not need one of these named rods to attempt the mutation. A lower-tier rod with Mutated can still be used; the important principles are to fish in the correct pool and maximize catches per minute.

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3. Fish continuously at the UFO

Once positioned in the highlighted water:

  1. Cast into the water immediately around the crashed UFO.
  2. Complete each catch and inspect the result for the Gleebous mutation.
  3. Cast again without leaving the pool.
  4. Continue until you obtain the mutation.

There is no source-supported fixed number of casts or guaranteed time limit. Treat it as a repeated mutation roll rather than a one-time interaction.

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Rod passive and Mutation Surge caveats

Some players recommend avoiding rods whose built-in mutation passive competes with the natural Gleebous roll. This is a community optimization, not a documented official rule. If you have a choice, a rod with Mutated and no conflicting mutation passive may be preferable, but do not abandon a workable rod solely because of an unverified interaction.

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Community reports also disagree about Mutation Surge. Some players say it helps Gleebous, while others say it does not affect the Gleebous roll. The retrieved evidence does not verify either position, so Mutation Surge should not be treated as a guaranteed requirement or a guaranteed boost.

Can the Appraiser give you Gleebous?

No. The detailed guides state that Gleebous cannot be generated through the Appraiser. Appraising, buying, or rerolling fish is therefore not a farming method for this mutation. Catch fish directly in the Roslit Bay UFO pool instead.

What to do after catching Gleebous

Gleebous is required for Dr. Crookspine’s Glorp-related progression and is associated with obtaining the Blade of Glorp.

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One guide reports that you should hold the Gleebous fish and return to Dr. Crookspine at The Laboratory, listed at -1915, 225, -530, then submit it. Because this turn-in coordinate and interaction behavior are reported by one guide rather than multiple sources, use the current quest marker or Dr. Crookspine’s dialogue if the location does not match your version.

Common mistakes

  • Fishing anywhere in Roslit Bay: the relevant area is the crashed UFO pool, not every body of water in the region.
  • Using -1450, 135, 750 as the exact hotspot: this is a broader Roslit Bay navigation point, not the more specific Gleebous coordinate.
  • Fishing outside the Fish Radar overlay: cast in the light-green highlighted water when the radar is active.
  • Trying to appraise a fish into Gleebous: the mutation must be obtained through fishing in the restricted area.
  • Assuming an endgame rod is mandatory: the reported setup works with any suitable rod carrying Mutated, although faster rods produce more attempts per minute.

Short version

  1. Get the Mutated enchant on a suitable rod.
  2. Use GPS to reach -1441.2, 133, 262.9 at the Roslit Bay crashed UFO.
  3. Cast into the water on either side of the UFO, preferably inside Fish Radar’s light-green overlay.
  4. Use high Lure and Progress Speed to increase catches per minute.
  5. Keep fishing until a catch receives the Gleebous mutation.

The location and farming method described here are based on guides updated December 7–9, 2025, with later search coverage repeating the same Roslit Bay location. Game updates can change coordinates, rods, or quest interactions.

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