Beware the box-jelly

This jellyfish is called a box-jelly, or a cubomedusa. This type of jellyfish can deliver toxic stings, so it was collected very carefully by a researchers working in the Phoenix Islands, a remote archipelago of coral islands in the equatorial Pacific. The islands, their coral reefs and surrounding water are part of the Phoenix Islands Protected Area, the largest marine reserve in the world.
(Photo by Larry Madin, Woods Hole Oceanographic Institution)