any of various crabs that protect their soft unarmored abdomens by occupying and carrying about the empty shells of snails.
soft animals without bony skeletons. They come in many shapes and colors. With their many arms they catch their prey.
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, forming whole colonies. Some look like branches; others are round or disk-like.
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 on their 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 pointed teeth, are on the underside.
like fireflies, have luminous, or light-producing, spots on their bodies that light up their dark surroundings. Some have a lantern-like organ that dangles in front of their mouths, attracting other fish which become their prey.
Small fish with horse-like heads bent sharply downward and curled tails; swim in upright position.
Spiny-backed fishes inhabiting northern fresh waters and sea inlets, the male of which builds and guards the nest.