A team of university students in Japan identified an entirely new species of the mighty Portuguese Man O’War. It’s easy to mistake the Portuguese Man O’War (Physalia physalis) for a jellyfish. But while the Man O’War (also known as a bluebottle) resembles a jellyfish, it’s actually an evolutionary relative known as a siphonophore. For around 250 years, marine biologists believed the Man O’War was its own distinct species. Although the first of its kind to be documented, the planet’s shifting climate suggests it will be far from the last P. mikazuki sighting.