The bottom-dwelling, jelly-bodied
Nudibranch might look an unlikely canvas for Mother Nature to express
her wildest indulgences of color and form. But these shell-less
mollusks, part of the sea slug family, bear some of the most mesmerizing
shapes, sumptuous hues, and complicated patterns of any animal on
Earth. There are over 3,000 well-known species of Nudibranch, and newest
are being recognized almost daily. They are originate throughout the
world's oceans, but are most plentiful in shallow, tropical waters.
Their scientific name, Nudibranchia, means naked gills, and explains the
feathery gills and horns that most wear on their backs. Usually oblong
in shape, Nudibranchs can be thick or flattened, long or short, ornately
colored or drab to match their surroundings. They can grow as small as
0.25 inches or as large as 12 inches long.
They
are carnivores that slowly ply their range grazing on algae, sponges,
anemones, corals, barnacles, and even other Nudibranchs. To recognize
prey, they have two highly responsive tentacles, Named “rhinophores”,
situated on top of their heads. Nudibranchs get their coloring from the
food they eat, which assist in camouflage, and some even retain the
foul-tasting poisons of their prey and secrete them as a defense against
predators. Nudibranchs are instantaneous hermaphrodites, and can mate
with any other mature member of their species. Their lifespan are varies
generally, with a few living less than a month, and others living up to
one year.
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