I was taught in algebra class that irrational numbers were such a controversial subject that a mathematician was killed over the discovery. It always fascinated me that something thought to be an occult secret of the universe was now taught to elementary students. However, when I attempted to narrow down exactly what happened I found conflicting and unconfirmed stories. The common theme is that someone was thrown off of a boat or "consumed by the ocean" in relation to the square root of two. Usually it's credited that Hippasus of Metapontum was killed by the Pythagoreans (sometimes even Pythagoras himself), either because the discovery was heretical or was a secret that the common man wasn't ready to know. What is the origin of this story and what most likely actually happened?

Example of an unverified recollection of the story: https://nrich.maths.org/2671