Risso's Dolphin has a uniquely blunt, squarish head that lacks a distinct beak and a body that becomes increasingly white with age due to extensive scarring from the teeth of conspecifics and the suction cups of squid. Older adults can be almost entirely white with a network of pale scars. Risso's dolphins specialize in deep-water squid, diving to considerable depths at night when squid rise toward the surface.
Best time to see a Risso's Dolphin
The best time to see a Risso's Dolphin is April–September, when about 65% of U.S. sightings happen, based on 1,311 research-grade iNaturalist observations.
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