In size, jellyfish can range from one millimeter to 16 inches.
In terms of color, jellyfish can come in a wide range of hues from yellow to deep blue to vivid purple to pale lilac to bright orange to deep red.
Having a smooth body with small tentacles, jellyfish can sting other organisms. They lack bones, brains, hearts, and eyes.
The Portuguese man o’ war is a carnivore that eats small fish, plankton, worms, and crustaceans.