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Marrus orthocanna
is a
species
of
siphonophore
, a
colonial animal
composed of a complex arrangement of
zooids
, some of which are
polyps
and some
medusae
. It lives at depths ranging between 200 and 800 m (660 and 2,600 ft), in the
Arctic
and other cold, deep waters.
Photograph: Kevin Raskoff
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