A dolphin wearing a "critter-cam" is heard to utter a squeal upon echolocating, then eating, a fish in murky water. Researchers believe dolphins and whales squeal with delight, much like human children, upon successfully performing rewarding tasks.
A dolphin wearing a "critter-cam" is heard to utter a squeal upon echolocating, then eating, a fish in murky water. Researchers believe dolphins and whales squeal with delight, much like human children, upon successfully performing rewarding tasks.
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