The Dope Fish Lives is an easter egg found in the second episode of Quake and was also only found in the 3rd level The Crypt Of Decay.
How to find the easter eggEdit
To find it, the player must go to the top bridge where the nail-shooting traps are. When the player is at the start of the bridge, the player must go to the left wall beside from where you came from. While the player is on the edge, there is another but small edge. When the player is at the far end of the small edge of the wall, the player will stumbel across a Well full of water and the player needs to go to the far bottom of the Well and the player will see the Dopefish swimming inside with a text saying "The Dopefish Lives!" repeadingly appearing on the screen.