Multiple reports indicate that a 300-million-year-old sea creature was designated the world's oldest octopus by the Guinness World Records. However, the title has now been withdrawn, as the fossil was not an octopus. The reclassification leaves questions about the fossil's true identity, with its specific type remaining unknown.
It is also unclear why Guinness World Records withdrew the title and what evidence or re-evaluation prompted this decision. Additionally, the exact timing of the withdrawal and whether a new record holder for the world's oldest octopus exists have not been confirmed.