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Small Crustaceans: The arthropods which make up the class of crustaceans are a most interesting group. The members of this class are the sow bugs and pill bugs, which are terrestrial; the crabs, lobsters, shrimps, and their relatives, which are all marine animals; and the crayfish, or crawdads as children call them, which are fresh water inhabitants. The hard, shell-like body covering of the crustaceans is due to lime which is derived from their food and water. The word Crustacea means hard and shell-like.
The sulphurbottom feeds 01 small crustaceans, and the finbacks and hump backs on various fishes, such as the cod, pollack herring, and capelin. They all engage in seasona migrations. During the summer months grea numbers congregate about Newfoundland, Ice land, and the north of Norway.
They are grotesque creatures that spend their lives in the mud or sand at the bottom of ponds, lakes,and streams. They feed upon all kinds of small aquatic animals: crustaceans, young of stone flies, mayflies, other dragonflies, salamanders, frog and toad tadpoles, fish, and so on.
All the members of this interesting order are among man's best friends as they consume large quantities of noxious insects. |
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