1 volume (unpaged) : color illustrations ; 26 cm
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"A Neal Porter Book."
Subtitle from jacket.
"Did you know that baby dolphins are usually born tail-first? Did you know that each dolphin has a unique whistle (like a human's fingerprints) that makes them instantly recognizable to their friends? Did you know that killer whales are actually a kind of dolphin?" -- from jacket.
Includes bibliographical references.