Risso's Dolphin Grampus griseus (G. Cuvier, 1812)  
Kingdom Animalia   >   Phylum Chordata   >   Class Mammalia   >   Order Cetacea   >   Family Delphinidae   >   Genus Grampus   

There are 8 records in the project database.

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The Risso's Dolphin, often called Grampus, can be found in deep temperate and tropical waters nearly worldwide. It subsists primarily on squid and fish, and is often found in groups of 10 to 50. This species can be identified by its large dorsal fin, almost-square head, and often through extensive scarring on the body, especially on older adults. Color can range from dark gray to almost white. This photo was taken far offshore in Maryland waters on a pelagic trip out of Lewes, Delaware. The small, lighter fin the background is that of a young calf. Note the extensive scarring on the adult in foreground. Photo by Bill Hubick. (MBP list) (More of this species)

A Risso's Dolphin loafing off the Channel Islands NP, California (9/3/2013). The marks on the back are from other Risso's tooth-marking and from the squid on which they prey. These markings are used by researchers to track individuals and groups. Photo by Nancy Magnusson. (MBP list)


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