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THE
WONDERFUL, WEIRD WORLD OF SEA DRAGONS
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The
leafy sea dragon (left) and the weedy sea dragon (right) both live in southern
Australian seas. They look different because each is perfectly adapted to
different depths: streamers of tissue let the leafy sea dragon live unseen among
plants at 30-90 feet of water while the red, purple and yellow colors of the weedy
sea dragon hide it among the vivid sponges deeper down.This creature may appear
fragile but it's really wearing a coat of armor. The scales that cover most fish
have changed into bony plates and rings that protect its soft body. |
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| Along
with their sea horse cousins, sea dragons are unique among fishes in the way they
breed: the parenting roles are reversed. The female sea dragon deposits up to
250 eggs on the males body where they stay until they hatch, in about two
months. When the baby is ready, the egg opens with a pop. |
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baby just hangs from the egg, straightening out. Then, it begins to wriggle free
and swims off on its own. In the first month, the baby grows from just 1½ inches
to four inches. In about two years, it reaches the adult length of 10-12
inches. |
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At
first, the baby sea dragon is a miniature of the adult, just smaller and with
simpler "leaves." As the days pass, its color will deepen and the appendages
become longer and more elaborate. |
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Two more things that make sea dragons
weird and wonderful: eyes and mouth. Each of the creature's two eyes moves
independently, so a sea dragon can look left and front and right and backward
at the same time! Also, since it has no teeth, the sea dragon must slurp
up tiny shrimplike animals through its long tube-mouth, like drinking through
a straw.
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Sea Dragon
Facts
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| Proper name |
Family Syngnathidae. |
| Life span |
Unknown, maybe eight years. |
| Food |
Tiny crustaceans called mysids. |
| Size |
10-12 inches. |
| Habitat |
Southern Austrlian waters. |
| Bonus fact |
Sea dragons are caught accidentally
in trawl nets and captured for aquariums, where they usually die. Now Australia
protects them from collectors by law. |
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