Ocean drifters once thought identical are actually several species. Genetics and ocean modeling uncover unexpected isolation.

The well-known Portuguese man o’ war — Physalia physalis — may look like a jellyfish, but it’s actually a siphonophore, or a ...

Long believed to be a single, globally distributed species drifting freely across the open ocean, the bluebottle – also known as the Portuguese man o’ war – has now been revealed to be a group of at ...

New research study shows Portuguese man o’ war isn’t just one species but four, with genetic and physical differences despite their overlapping ranges globally.

New research study shows Portuguese man o’ war isn’t just one species but four, with genetic and physical differences despite their overlapping ranges globally.

Nothing ruins a nice seaside swim than someone shouting about something swimming in the crystal clear waters, right next to you. While most people might mistakenly call a Portuguese man o' war a ...

Researchers confirmed the species deviations by comparing their collected man o’ wars to more than 4,000 images posted on the citizen-science website iNaturalist, according to the study.

Researchers confirmed the species deviations by comparing their collected man o’ wars to more than 4,000 images posted on the citizen-science website iNaturalist, according to the study.