The more than 1,000 species vary in size from a few millimetres (a fraction .... anemon live

Sea anemones are commonly yellow, green, or blue; they are attached by the pedal disk, or base, to a hard surface such as a rock, wharf timber, a seashell, or the back of a crab. In some species (e.g., Metridium ) the pedal disk breaks into fragments that grow into new individuals. Sea anemones often live in close association with other organisms. When the crab grows too large for its shell, it moves to a new one, transplanting the anemone to the new shell. The hermit crab Eupagurus prideauxi and the sea anemone Adamsia palliata are always found living together, never alone. Fishes of the genera Premnas and Amphiprion often live safely among the poisonous tentacles of an anemone such as a species of Stoichactis , Radianthus , or Discosoma . Such fish, however, may be stung and eaten by other anemone individuals, even of the same species. anemon live