We have a real Sea Serpent - that literally lived before; through the Asteroid and thrived thereafter ...and everyone forgotten about it ( ! )
https://www.iflscience.com/the-worlds-largest-ever-sea-snake-was-over-12-meters-long-and-might-have-eaten-sharks-82187
https://a-z-animals.com/blog/meet-the-massive-sea-snake-that-feasted-on-whales-seriously/
What do you think?