Problem — 1.the Goldfish

The episode’s title centers on a seemingly small detail: Steven’s one-finned goldfish, Gus. When Steven wakes up to find Gus has suddenly grown a second fin, it's the first clear sign that his reality is leaking. We later learn that Marc Spector bought a new fish to cover up that the original Gus died while Marc was "away".

He wakes up in the Austrian Alps, chased by armed men and a terrifying Egyptian jackal. 1.The Goldfish Problem

Steven uses ankle restraints and tape on his door to keep himself grounded. The episode’s title centers on a seemingly small