Portuguese Men of War have been washing up along the coast in bright blue bunches that may be pretty to look at, but not so ...

An invasion of these jellyfish look-alikes has reached Texas coastlines, threatening the safety of beachgoers.

If you have spent any time at the beaches on the Texas Gulf Coast, chances are you have seen jellyfish either in the water or washed up on the shore. However, there is another creature similar to a ...

Anyone unfamiliar with the biology of the venomous Portuguese man-of-war would likely mistake it for a jellyfish. Not only is it not a jellyfish, it's not even an "it," but a "they." The ...

The man-o-war, a relative of the jellyfish, has the same capacity to sting on both water and land, and even a dead ...

Later on, during the spring, many thousands of big barrel jellyfish started turning up on our beaches. "Both were harmless but these Portuguese man o' war are capable of giving extremely painful ...

This is what a Portuguese man o' war looks like when it is fully inflated There have been previous sightings of the jellyfish-like creature on beaches in County Clare and County Antrim.