In the shore-pools it is harder still.
Some are swaying about in the still, clear water, moving their long
feelers from side to side. Others have burrowed into the sand. In doing
this, they raise a sandy cloud, which settles on them and hides them. To
catch some, you must use a "shrimp-net," for they can dart across the
pool like arrows.
[Illustration: THE SHRIMP.]
Some are Shrimps, and some are Prawns; how can we tell the difference?
When they are boiled the answer is easy. All the Shrimps turn brown and
the Prawns red. (The red "Shrimps" are near relations of the Prawn.) To
tell a live Shrimp from a Prawn, look at the long pointed beak which
juts out from the front of the head. That of the Prawn is toothed, like
a little saw. If the beak is quite smooth its wearer is a Shrimp.
Until Prawns are grown up, they haunt the sandy shallows with their
cousins the Shrimps. But the larger Prawns live in deeper water. They
are generally caught in traps, as are their relatives, the crab and
lobster.
Now look closely at a Prawn, and try to find how it swims. Turn it
upside down.
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