feeler can be moved from side to side, and can also be tucked away, out
of sight and out of danger; but, when hungry, the animal spreads them
widely, for, as we shall see, they are the net in which it catches its
dinner.

The whole body of the Anemone is like two bags, one hanging inside the
other. The space between the two bags is filled with water. The feelers
are hollow tubes which open out of this space; so they, too, are filled
with water.

[Illustration: CRUSTACEA.

1. THE LARVA OF A LEAF-BODIED CRUSTACEAN CALLED PHYLLOSOMA.

2. A PRAWN-LIKE CREATURE, SHOWING THE FRONT LIMBS THAT ARE USED FOR
GRASPING PREY.

3. A CRAB.

4. THIS IS A SHRIMP-LIKE CREATURE CALLED CUMA SCORPIOIDES.]

The Anemone can press the water into them, and so force them to open
out. In rather the same way you can expand the fingers of a glove by
forcing your breath into them. The Anemone, you see, can open or close
just as it pleases.

What does it eat, and how does it find food? Perhaps you have watched an
open Anemone in a pool, or in a glass tank, and seen it at its meals. A
small creature swims near, and touches one of the feelers. Instead of
darting away, it appears to be held still; and then other feelers bend