Except we might need to rethink that last one. In 2020, scientists discovered a jellyfish-like parasite that doesn't have a mitochondrial genome – the first multicellular organism ever found ...

Puzzled, the researchers searched through research on jellyfish and found a 1908 book in which zoologist Henry Farnham Perkins suggested that the cell clusters could be parasites, after his theory ...

When most people think of parasites affecting their pets, they imagine heartworms in dogs or roundworms in cats. However, ...

Hundreds of thousands of Atlantic salmon (Salmo salar) died on fish farms in Scotland in the final months of 2024. The mass ...

The evolutionary origin of a large group of microscopic parasites called myxozoans was confirmed by a study published in PNAS last fall (November 16), and the result is somewhat surprising. Myxozoans ...

Jellyfish are known for drifting to and fro at the whim of ocean currents—but not all species are so passive. The millions of golden jellyfish that pack Palau’s Jellyfish Lake spend much of ...

These jellyfish are solo explorers ... In return, the fish aided the jelly by removing parasites. Lydia Smith is a health and science journalist who works for U.K. and U.S. publications.