Final answer:
Saturn's moon Titan has lakes of liquid hydrocarbons, such as methane and ethane, in its warmer equatorial regions, making it unique in our solar system.
Step-by-step explanation:
The celestial body known for its equatorial lakes of liquid hydrocarbons rather than liquid water, particularly in warmer regions, is Saturn's moon Titan. Titan's atmosphere is thicker than that of Earth, and it features hydrocarbon lakes alongside rivers of liquid methane and ethane, which participate in a methane cycle akin to Earth's water cycle. Despite the frigid temperatures that are far too cold for liquid water, these lakes are composed primarily of methane and ethane, making Titan a candidate for the study of "life as we don't know it".