හවුල් ශ්‍රව්‍ය

What if I told you there’s a sea so strange… fish can’t survive in most of it? 🌊😳 This is the Black Sea — and it’s one of the creepiest seas on Earth. Around 90% of the Black Sea has almost no oxygen… which means deep down, most sea creatures simply can’t live there. But that’s not the craziest part… The deep water is filled with hydrogen sulfide gas — a toxic gas that smells like rotten eggs. So under the surface, it’s basically a giant dead zone. Because of that, ancient shipwrecks that