Globster Tales: Sea Monsters, Fact or Myth?

Time for an old school episode, fam! We've all heard a tale or two of monsters of the sea: from the Kraken, Leviathan, and the Lusca to the Beisht Kione and Jörmungandr, no ocean is safe from these terrors of the depths. Were any of these creatures real, or are they just giant fish tales? Are they explainable or, like globsters, are they some amorphous and unidentifiable mystery? Let's get /comfy/ and take a dive into the realm of the sea monsters, shall we?