The Portuguese man o'war (Physalia physalis) floats along the surface using a gas-filled bladder and a clear vertical membrane as a sail. Although tempting to touch, this predator will give you a sting. #blueplanet2 #bbcearth #portuguesemanowar #amazingphotography #wildlife #wildlifephotography #naturephotography #amazinganimals #nature #naturelovers #earth #earthlovers