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mammal > whale, dolphin or porpoise > toothed whale > dolphin or porpoise > Dall's porpoise
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Dall's porpoise comparison table
Subject is a kind of have scientific name
dolphin or porpoisetoothed whale 
Dall's porpoisedolphin or porpoisePhocoenoides dalli

Next dolphin or porpoise: grey grampus    Up: dolphin or porpoise    Previous dolphin or porpoise: common dolphin