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Risso's Dolphin can grow to 12 feet long and weigh up to 1,100
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Risso's Dolphin can grow to 12 feet long and weigh up to 1,100
Education Marine Mammal Species Information - Marine Mammal Conservancy (MMC)
Risso's Dolphin
(Grampus griseus)
Risso's Dolphin can grow to 12 feet long and weigh up to 1,100
pounds. They are fairly abundant, with a wide distribution. They
are found in pods of anywhere from 3 to 50. There are reports of
temporary gatherings of several hundred. In the waters, they are
very acrobatic (breaching, cartwheeling, lobtailing, and spyhopping).
Primarily, they are squid eaters; hence, they have teeth only in
their lower jaw (a characteristic common to squid eaters). If sighted,
one might note the numerous scratches on the body of this species.
These scratches may have resulted from encounters with other grampus
or perhaps with the squid. Risso's dolphin have a crease down the
center of the forehead, from the blowhole to the upper "lip"
and is unique to this species.
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