Summary:
- Use Thalassar’s Ruin Rod to get a guaranteed Forgotten fish every 25 seconds
- Forgotten Mutation gives a 2x sell value boost
- Unlock the rod by completing Thalassar’s Secret pedestal puzzle
In Fisch, you can catch a wide variety of fish with unique and different mutations. One such special variant is the Forgotten Mutation, which allows players to earn maximum gold from the fish they catch. However, obtaining the mutation is quite challenging, as you need to secure a specific item that guarantees a 100 percent chance of getting it.
If you are facing trouble obtaining the Forgotten Mutation in this Roblox title, here is a detailed guide to help you out.
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Fisch Forgotten Mutation Guide

In Fisch, there is a guaranteed method to obtain the Forgotten Mutation, which requires you to use a special fishing rod called Thalassar’s Ruin. With this rod, you will get a 100 percent chance every 25 seconds to catch a Forgotten fish. So, the next task for obtaining the variant is to collect and equip the rod.
Where To Obtain Thalassar’s Ruin Rod To Get Forgotten Mutation in Fisch
The process to obtain Thalassar’s Ruin Rod is quite challenging. To begin, you need to travel to Thalassar’s Secret, located near the entrance of Tidefall. Once there, you will find a closed door that requires specific items to unlock. Place the following items on the pedestals:
- 1x Sunken Enchant Relic
- 2x Cosmic Relics
- 3x Exalted Relics
- 1x Tide Essence
- 1x Requis Essence
- 1x Thalass Essence
After placing all the required items, insert the Trident Rod into the gate. Once it opens, head inside to find Thalassar’s Ruin Rod that you can purchase for 14,500,000 C$.
Why To Get Forgotten Mutation in Fisch
With the Forgotten Mutation, you can sell fish for twice their normal value. In addition, these fishes have a distinct appearance, with a black colour and a translucent effect.
FAQs
Q. Is there any other guaranteed way to get the Forgotten Mutation in Fisch?
No, using Thalassar’s Ruin Rod is the only way to secure the fish.
Q. What makes the Forgotten Mutation valuable?
You can sell fish of this mutation for twice their normal value and also have a unique visual appearance.
Q. Where do you unlock Thalassar’s Ruin Rod?
You can unlock it at Thalassar’s Secret by placing the required relics and essences on the pedestals and opening the gate.
