What do you think the sea world is like? Incredible, marvelous, romantic or creepy, terrifying and mysterious? Or maybe a combination of all of these. The deep blue ocean has been extensively studied for decades and decades; yet it remains a mystery in many ways. The sea has always been a topic of mysterious tales. There are plenty of stories about of ships, planes, submarines, and people who have gone on exploration journeys only to vanish without a trace, fueling conspiracy theories.