Thermohaline staircases are distinctive, step-like vertical structures observed in the Arctic Ocean, characterized by well-mixed layers of water with uniform temperature and salinity, separated by thin, sharp interfaces where these properties change abruptly. These structures, primarily found in regions like the Canada Basin where warmer, saltier Atlantic Water underlays colder, fresher surface water, play a critical role in regulating heat transfer within the Arctic Ocean. They effectively mediate the upward flux of heat from deep Atlantic waters towards the surface and overlying sea ice. First observed in the late 1960s, the precise mechanisms governing their formation and long-term stability, or 'decadal coherence,' have been a significant focus of oceanographic research for decades. Recent studies, including those utilizing advanced detection methods like hierarchical density-based spatial clustering, have enabled scientists to track the evolution of these staircase layers over extended periods, some persisting for nearly two decades and spanning vast horizontal distances. This ongoing research reveals that these layers are not static; they exhibit dynamic behaviors such as sinking, warming in upper layers, and cooling in deeper ones. Crucially, emerging evidence indicates a concerning trend: thermohaline staircases are showing signs of weakening or even disappearing in certain parts of the Arctic Ocean's Canada Basin. This disappearance is linked to broader changes in large-scale ocean circulation and horizontal thermohaline gradients. Given their vital role in Arctic heat distribution, the evolution and potential decline of these staircases have profound implications for future sea ice melt rates and, consequently, global climate change projections. Understanding these complex oceanic phenomena is therefore essential for improving global climate models and informing strategies to address Arctic warming.