As beach season gets underway, reports are already emerging of jellyfish sightings and stings. Lion's Mane jellyfish were spotted in Dublin, Ireland; several beaches in Mexico's Sinaloa state were ...

The lion’s mane jellyfish, for example, holds the title of the world’s longest-known animal, with tentacles extending up to 120 feet in length.

Every summer more and more jellyfish are being washed up onto the shorelines around Wales. During Springwatch 2009, Simon King's team sought out jellyfish swarms but weren't lucky enough to find ...