Do not be fooled by the beautiful blue and pink colors of the Portugese Man o’ War (Physalia physalis). Their long tentacles can deliver a venomous sting, even when beached. Contact usually results in red welts but the venom can cause breathing trouble in some people. Surprisingly, it is a favorite food of Loggerhead Sea Turtles. I encountered these down on South Padre Island, thankfully, I have yet to find any on the beaches near me.