A well lit aquarium with a tranquil patch of sand is their prefered environment. Cubozoans contain 15 different species, such as the Box Jellyfish. Some are as large as 12 inches, but most are 1 to 2 inches. These jellyfish are extremely dangerously. Their sting can be lethal.
Anthozoans are the familiar anemones and corals.
There about 6000 species of anthozoans, and they all exist exclusively as a polyp. There are two general groups of anthozoa that will interest the hobbyist. The first is the anemones and true corals. These animals usually can be readily identified as a Cniderian due to their large conspicuous polyp like structure. The other group are the gorgonian like animals.