Red Rock Crab Essay
Red Rock Crabs are very fascinating crustaceans. A crustacean is (dictionary
definition): an animal with a hard outer shell, that usually lives
in water. Red Rock Crabs live under crevices in rocks. The rocks
where they live are usually located in tides on the Pacific Ocean.
The way you can tell the difference between a male and a female
is that on the abdomen, a female has a big round half oval like
this:
and a male has an abdomen like this:
The reason why the female has such a round abdomen is for holding
the eggs.
There are 4,500 different types of crabs in the world. Red Rock
Crabs are just one of them. Their scientific name is cancer antennarius.
The cancer magister also is called the dungeness crab. They are
commercial crabs and are set out in stores for people to buy and
eat.
Red Rock Crabs have black-tipped claws for protection and for
ripping apart their food. They also have a red and white exoskeleton.
They have little ridges on their shell for protection. The crab's
shell is made of muscle, bone proteins hardened by calcium sugar/glucose.
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