A third level can be defined to identify a particular host server at the Internet address. In our example, www is the name of the server that handles Internet requests. (A second server might be called www2.) A third level of domain name is not required.
Sea anemones are a group of water-dwelling, predatory animals of the order Actiniaria. They are named for the anemone, a terrestrial flower.Sea anemones are classified in the phylum Cnidaria, class Anthozoa, subclass Hexacorallia. sea anemone is a sessile polyp attached at the bottom to the surface beneath it by an adhesive foot, called a basal disc, with a column-shaped body ending in an oral disc.
Anemones are fish-eating animals that look like underwater flowers and have hundreds of poisonous tentacles. Clown fish find most of their food by mooching off the anemone. Clown fish wait until the anemone paralyzes and eats a fish, then helps itself to the bits which the anemone doesn't eat.