Hydrozoan with reversible life cycle now found worldwide.

A jellyfish-like hydrozoan with a novel power to rewind its life cycle has been spreading rapidly around the world’s oceans without anyone taking much notice, researchers say.

The life history of Turritopsis dohrnii takes such twists and turns that only a new genetic analysis has revealed that the creature is invading waters worldwide, says Maria Pia Miglietta of Pennsylvania State University in University Park.

For some reason the page bugs, read it there:
http://www.sciencenews.org/view/generic/id/33516/title/Nearly_immortal_sea_creature_spreads