Moonlight Shidao is an adventure puzzle game, and gem fish is an important prop in the game. In the game, the specific location of the gem fish is in the underground cave layer, and players can use the depth meter to quickly and accurately find the location of the cave layer, thus finding the gem fish.

In the game, the gem fish is located in the underground cave layer. This underground cave is a complex and huge maze, and players need to use tools such as maps and depth meters in the game to locate the specific location of the gemstone fish.