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Helix
aspersa, a common garden snail, can travel about two feet
in three minutes. At that rate, it would travel one mile
in 5 1/2 days!
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Deep
sea scallops can migrate in large numbers to find richer
feeding grounds.
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A
scallop swims without fins or a tail by squirting jet
streams of water out of its shell!
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About
140 species of marine snails live their entire lives without
touching bottom or shore. They are called pelagic gastropods.
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A
violet snail may travel hundreds of miles in its lifetime.
They are pelagic, floating with the ocean currents.
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An
oyster doesn't travel at all in in its adult lifetime,
unless we include the distance to a dinner table! An oyster
attaches itself to a rock or other shells when young,
and lives the rest of its life there.
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Some
freshwater mussels can travel many miles upstream by attaching
themselves to fish (when they are larvae), and riding
wherever the fish may take them! They are parasites on
the fish until they're mature enough to seek a new life
where ever they may be. |
