What is the rarest sea monster?

I'm intrigued by the mystery of the sea and its many creatures. Have you ever wondered what the rarest sea monster might be? It's a fascinating question that has captured the imaginations of sailors, explorers, and cryptozoologists for centuries. Could it be a giant squid, rumored to reach colossal sizes and live in the deepest, darkest depths of the ocean? Or could it be a mythical creature like the Loch Ness Monster, whose existence has been debated for ages? Whatever the answer may be, the search for the rarest sea monster is a thrilling adventure that takes us to the very edges of our knowledge and imagination.