Portuguese Man o' War

As you can see the Man o War is right next to a plastic bag.
Leatherback sea turtles who eat Man o war can eat floating plastic garbage in the oceans thinking its a jelly fish. In recent studies 50 percent of leatherbacks had been found with plastic bags or cellophane lodged in their stomachs or intestines. Also dead sea turtles have been reported containing everything from pieces of plastic milk jugs to bits of balloons, items likely ingested when mistaken for jellyfish.