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.
Sea Cucumber. The sea cucumber is a marine animal (not plant) that is an echinoderm from the Holothuroidea class. It has leathery skin, an elongated body like a cucumber, and a single, branched gonad.They are found worldwide on the sea floor.ike any other echinoderm, sea cucumbers have an endoskeleton that is below the skin. A remarkable characteristic is that the catch collagen that forms on their body walls. This can be loosened and tightened when the sea cucumber wants it to be, and can be used to squeeze through a small gap.