Explore the trenches of the Luminescent Cavern in Fisch and make your way in by finding the correct set of keystones.

The Luminescent Cavern is another area in Fisch, and getting there requires a mighty effort. It is a new biome that features different fish, but you will need a specific set of keystones to open the entrance. This will require you to visit different islands to get the keystones found across different islands.
In this guide, we will be taking a closer look at everything there is to know about the Luminescent Cavern in Fisch. Find out where it can be located and what you need to get inside.
Also Read: Fisch Aquarium Guide for Maximum Profits
Unlocking the Luminescent Cavern in Fisch

It is worth noting that you can’t use just any keystone to open the Mysterious Crack. First, head to Sunstone Island and make your way to the Desolate Deep section, where you will see the crack and three pedestals. From here, you will learn which specific combination or set of keystones to get. Each Roblox player will get a unique combination, meaning you must follow the set to get into the Luminescent Cavern.
Keystone Locations
There are 9 keystones, but you will only need 3 to get into the cavern. Nevertheless, we listed down every single keystone location and its respective coordinates for your convenience.
Keystone | Coordinates | Location |
---|---|---|
Skull Keystone | -2797.5, 209, 1544.2 | Forsaken Shores |
Snowflake Keystone | 2788, 153.5, 2603 | Snowburrow |
Cliff Keystone | 473, 230, -2159 | Castaway Cliffs |
Sun Keystone | -935, 223, -984 | Sunstone Island |
Mushroom Keystone | 2666, 130, -717 | Mushgrove Islands |
Lightning Keystone | -3406, 134.2, 262.2 | Grand Reef |
Fossil Keystone | 6065, 225.5, 259.5 | Ancient Isles |
Turtle Keystone | 57, 149.5, 2032 | Terrapin Island |
Volcano Keystone | -2797.5, 209, 1544.2 | Roslit Volcano |
Once you have all the requested keystones, head back to the pedestal and place them in. Take your diving gear and cross the Mysterious River to get the full Luminescent Cavern experience in Fisch.
Read More: All Special Fish in Fisch
FAQs
Where Can You Find the Luminescent Cavern?
This area is an extension of the Desolate Deep.
How Many Keystones Are Required To Open the Mysterious Crack?
You will need at least 3 to get in.
What Can You Find in This New Area in Fisch?
There will be different fish for you to catch inside the Luminescent Cavern.

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