文档介绍：Sandy and muddy Tough papery
tube protects
soft worm inside
In shallow coastal waters, from the lowest part
of the shore to the edge of the continental shelf, Worm can grow
up to 16 in
sand and mud are washed from the land, creating (40 cm) long
vast stretches of seafloor which look like underwater
deserts. Finer-grained mud settles in places where
the water is calmer. Without rocks, there are no Bulky body
covered by
abundant growths of seaweeds, so animals that dense mat
venture onto the surface are exposed to predators. Coarse, shiny of fine hairs
bristles help it
Many of the creatures avoid them by hiding in the to move along
soft seabed. Some worms hide inside their own tubes, seabed
but they can feed by spreading out a fan of tentacles
or by drawing water containing food particles into
their tubes. Other worms, such as the sea mouse,
move around in search of food. Flat fish, like the
flounder, monly found on the sandy seabed,
looking for any readily available food, such as peacock Beautiful bristle worm
worms. All the animals shown here live in the The sea mouse plows its way
through muddy sand on the seabed
coastal waters of the Atlantic Ocean. Light color and is often washed up on the beach after
helps it merge storms. The shiny, rainbow-colored spines help
Thick trunk looks into sand propel it along and may make this chunky worm less
like a peanut, when appetizing to fish. The sea mouse usually keeps its rear
whole body end out of the sand to bring in a stream of fresh sea
retracts water to help it breathe. Sea mice grow to
4 in (10 cm) long and eat any dead
animals they may find in
the sand.
Surface of plump,
unsegmented body Peanut worm Front part
Poisonous feels rough Many different groups of worms can also
spines on live in the sea. This is one of the sipunculid retract
first dorsal worms, sometimes called peanut worms. A stretchy
fin front part can retract into the thi