Is it possible that sea monsters could exist?

There have been myriad accounts of sea goers and their encounters with creatures unbeknownst to the world. There are reported attacks, harmless sightings, or mysterious carcasses washing ashore. The descriptions range from giant versions of known species, such as squid or jellyfish, to horned serpents, sea monsters... show more There have been myriad accounts of sea goers and their encounters with creatures unbeknownst to the world. There are reported attacks, harmless sightings, or mysterious carcasses washing ashore. The descriptions range from giant versions of known species, such as squid or jellyfish, to horned serpents, sea monsters with hair, and anything else imaginable. Many of the "serpents" are said to swim in an undulating manner, unlike the side-to-side motion of fish. There have also been detailed encounters beasts resembling the thought-to-be-extinct dinosaurs, such as the plesiosaur. But the sea is a vast and mysterious place, the sea has many secrets, so is it possible since the ocean is such a deep and dark place?
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