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Environment
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What it eats
The cockle filters its food, which is
composed of microscopic organisms, out of the water. Water is pumped in
via the larger and fringed inhalent siphon. The filtered water is then
pumped out through the smooth exhalent siphon. Because of the differences
in areas of the siphons, the larger inhalent siphon creates a weak suction
with low velocity, while the narrow exhalent siphon creates a flow with
high velocity. In this way filtered water is squirted far away from the
cockle and prevented from being sucked in again.
The arrows depicts flow direction through the inhalent
and exhalent siphons.
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