Explainiosity on Instagram: "The post features a short educational clip revealing the existence of brine pools—dense, hypersaline bodies of water sitting on the ocean floor that appear like underwater lakes, sharply separated from the surrounding sea. These pools form when salt deposits dissolve, increasing water density enough to prevent mixing, creating toxic boundaries where most marine life cannot survive, yet specialized microbes and extremophiles thrive. Shared across Instagram and TikTok