any of various crabs that protect their soft unarmored
by occupying and carrying about the empty shells of snails.
soft animals without bony skeletons. They come in
shapes and colors. With their many arms they catch their
most have five arms growing from a central disk.
The mouth of a
starfish is on the underside of this disk, and it has a single, simple
eye on the end of each arm.
similar to tiny sea anemones that build hard skeletons around
themselves. Hundreds and hundreds of them stick together,
whole colonies. Some look like branches; others are round or
there are roughly 80,000 types of snails and slugs.
Some live on
land, others live in the sea or in lakes. Some carry a shell
backs; others have none. They come in many colors and shapes.
some are fat and round, others are thin and spindly.
Many have long
spines (sometimes poisonous) with which they move around and dig into
the mud or rocks or other places. Their mouths, with five
teeth, are on the underside.
like fireflies, have luminous, or light-producing, spots on
bodies that light up their dark surroundings. Some have a
organ that dangles in front of their mouths, attracting other fish
which become their prey.