The Hidden Pipefish in Fisch is caught at Castaway Cliffs, and the strongest sources I found say to fish there at night with foggy weather and Seaweed bait. It’s also listed as a Legendary, nocturnal fish, so it can be a stubborn catch.

What to do

  • Go to Castaway Cliffs.
  • Fish at night.
  • Wait for foggy weather.
  • Use Seaweed as bait.
  • Bring a strong rod; one guide recommends the Kraken Rod or higher.

Why it feels “hidden”

The fish is described as rare and erratic, which means it can move unpredictably and take longer than normal fish to hook. That’s why players often treat it like a special spawn rather than a quick normal catch.

Quick route

  1. Travel to Castaway Cliffs.
  2. Set up during night.
  3. Wait for fog.
  4. Equip Seaweed.
  5. Keep casting until it bites.

Small tip

If you’re missing it after a few tries, the issue is usually timing, not location, because the fish appears tied to a specific weather-and-time window rather than a puzzle chain.

TL;DR: Fish at Castaway Cliffs, at night, in fog, using Seaweed, and use a strong rod if possible.