Fisch Secret Rod Quest: Underground Music Venue Walkthrough

The secret rod hunt tied to the April Fools content in Fisch runs out of the Underground Music Venue beneath Crystal Cove, where three NPCs trade fish deliveries for cryptic directions. Progress hinges on catching six exact fish variants, collecting the bobbers those trades award, and then solving an encrypted clue that sends you across the map.

Quick answer: Enter the Underground Music Venue, deliver all six required fish to Migura, Tawou, and Mac to receive three bobbers, then perform the “birdbrain” emote on the Roslit Bay volcano to reveal an encrypted message. Decode it with a Vigenère cipher using the key FISCHIPEDIA, which points you to Terrapin Island.

Open the Underground Music Venue in Crystal Cove

The venue is hidden inside Crystal Cove and only opens after you interact with a pedestal. Work through the cove before you start catching fish, since the three NPCs live inside.

Head into the depths of Crystal Cove and make your way toward the catwalk.

Walk to the end of the tunnel along the catwalk to spawn inside the Crystal Cove interior.

Place a chaotic enchant relic into the pedestal. This opens the entrance to the Underground Music Venue.

Enter the venue. You will find three NPCs seated at a table, named Migura, Tawou, and Mac, with a dancing cockroach in a sombrero at the center. The cockroach is a returning red herring from a previous event, so don’t expect it to advance the quest.

Six fish the NPCs require

Each NPC wants two specific fish, for six deliveries in total. Every request is a base fish with a particular mutation, so you need the rod that applies that mutation. Migura, Tawou, and Mac are themed after Vocaloid characters (Teto in red, Neru in yellow, and Miku in blue).

NPC	Fish required	Rod for the mutation
Migura (red)	Crimson Bluelip Batfish	Scarlet Spinecaster Rod
Migura (red)	Sanguine Bluelip Batfish	Sanguine Spire
Tawou (yellow)	Shiny Solar Largemouth Bass	Daybreaker Rod
Tawou (yellow)	Shiny King’s Blessing Largemouth Bass	Poseidon Rod
Mac (blue)	Sunken Grand Reef Guardian	Sunken Rod (or Scavenger)
Mac (blue)	Shiny Abyssal Grand Reef Guardian	Rod of the Depths

The base fish come from set locations. Bluelip Batfish is a Common found in the Luminescent Cavern. Largemouth Bass is a Common found at Moosewood Island. Grand Reef Guardian is a Mythical found in the Grand Reef, which makes Mac’s two requests the slowest to complete.

Bobber rewards after all six deliveries

Once you hand over all six fish, the NPCs award three unique bobbers. Receiving them confirms the delivery stage is finished, and the NPC dialogue then changes to give you the next clue.

Mini Reef Guardian
Not-So-Largemouth Bass
Redlip Batfish

Read the clue at the Roslit Bay volcano

After the trade, two of the NPCs lie, and one tells the truth. Mac and Tawou both suggest searching around the volcano at Roslit Bay, and that advice is the trap the quest wants you to test.

Travel to the top of the volcano in Roslit Bay.

Open the emote menu and use the “birdbrain” dance. Performing it here gives you a Red Herring fish (Common, 1kg, worth 40 C$), which literally confirms the volcano advice was a false lead.

Move to the specific ledge at the top of the volcano and face directly toward Sunstone Island.

Use the “birdbrain” dance again from that ledge. This triggers an encrypted text prompt on screen.

imwr dqillv tmm zghzi si bhj bmtatt,
mq i pqiug izqapqnl eavo icglmny xgylz;
3 ivhiszzwu hzt llldjv.
mul bwi swwjz og 'cm qivbobmv vv kaidz tmm hcap,
asrs bjggpk ewew bhj mqgz kpr smrhmaxl

Decode the message with the Vigenère key

The prompt is a Vigenère cipher. Paste the encrypted text into any Vigenère decoder and enter the key FISCHIPEDIA to reveal the destination.

deep within the heart of the turtle,
in a place brimming with ancient power;
3 treasures are hidden.
use the power we've bestowed to clear the path,
look beyond what the eyes can perceive

The “heart of the turtle” points to Terrapin Island. Travel there and enter the Terrapin Hideaway cave to reach the secret area referenced by the clue.

Tip: If the ledge prompt never appears, confirm you actually received the three bobbers first. The encrypted text only becomes available after the delivery stage is complete and the NPC dialogue has updated, so a missing or wrong fish variant is the most common reason the clue fails to trigger.