What are layers of water with different temperatures called?

The term for layers of water with different temperatures is thermoclines. A thermocline refers specifically to a distinct layer in a body of water where the temperature changes rapidly with depth. This phenomenon is significant in diving, particularly in limited visibility conditions, as thermoclines can greatly affect a diver's experience.

In many aquatic environments, warm water often sits above cooler water, creating a noticeable thermal boundary that can influence buoyancy and visibility. Understanding thermoclines is crucial for night diving, as divers must be aware of how temperature layering can affect their ascent or descent and overall dive strategy.

The other terms listed, while related to water properties, do not correctly describe the temperature-specific layering. Stratifications refer more generally to layers in a body of water based on various properties, haloclines refer to layers with different salinities, and thermal boundaries could be considered a more general term rather than a specific identifiable layer like a thermocline.