The Porpita or the Blue Button lives on the surface of the sea and consists of two main parts: the float and the hydroid colony. The hard golden-brown float is round, almost flat, and about one inch wide. The hydroid colony, which can range from bright blue turquoise to yellow, resembles tentacles like those of the jellyfish. Each strand has numerous branchlets, each of which ends in knobs of stinging cells called nemasrocysts. The blue button sting is not powerful but may cause irritation to human skin. The blue button has a single mouth located beneath the float, which is used for both the intake of prey and the expulsion of wastes.
The organism lives almost entirely on the surface of the water, so it's habitat consists of little more than the wide-open sea, warm waters and very petite swimmers to munch on. This animal is not one that needs a place to sleep or hide away in so not much can possible affect it's habitat.