Behavior
Hourglass dolphins tend to move in groups of about 5 to 10. One International Whaling Commission study recorded a group of 60.
They share feeding grounds with other cetaceans such as sei, pilot, bottlenose and minke whales and southern right whale dolphins. They are regularly seen with fin whales. Whalers who were hunting these much larger animals used hourglass dolphins as "look-outs" to aid them in their hunt. Hourglass dolphins are keen bow-wave riders.
Examinations of the stomach contents of the few specimens indicate they eat various (unrecorded) types of squid and small fish.
Read more about this topic: Hourglass Dolphin
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