-Animals (Kingdom Animalia)

-Cnidarians (Phylum Cnidaria)

-Sea Anemones and Corals (Class Anthozoa)​

-Subclass Hydroidolina

-Athecate Hydroids (Order Anthoathecata)

-Suborder Capitata

-Family Porpitidae

-Genus Porpita

-Blue Button (Porpita porpita)

The Blue Button, scientifically known as Porpita porpita, is a small, floating colonial hydrozoan commonly found in warm tropical and subtropical oceans. Although it resembles a single jellyfish, it is actually a colony of specialized polyps working together as one organism. The most distinctive feature is its circular, flat, bright blue central disc—often 1–3 cm across—surrounded by radiating, tentacle-like feeding structures that may be blue, turquoise, or yellowish. Unlike the Portuguese man o’ war, it lacks a sail and instead floats at the sea surface using a gas-filled float embedded in the disc. Blue Buttons drift with currents and winds in open ocean waters and often wash ashore in large numbers. Their tentacles contain nematocysts (stinging cells) used to capture tiny plankton and small marine organisms. While they can cause mild skin irritation if handled, their sting is generally not dangerous to humans.