Portuguese Man O' War (Physalia physalis), is a jellyfish-like marine invertebrate of the family Physaliidae. Its venomous tentacles can deliver a powerful sting. Also called Blue Bottles.
Portuguese man-of-war tentacles. The Portuguese man-of-war, Physalia physalis (Siphonophorae - Physaliidae) stands out for its beauty, its deadly effectiveness, and its composition.
Jelly-Riding Crab Photograph by Hannah Johnson, A crab clings to its floating host as both are swept out to sea near Wrightsville Beach, North Carolina. One role jellyfish play in the marine ecosystem is the transport of other animals across the ocean.