Harderwijk Dolfinarium to abolish tricks but continue dolphin shows
Wild dolphins learn to "tail-walk" on the water, yet it's just a fad - Biology Online Archive Article
dolphin doing a trick - Earth Buddies
Friendly Bottlenose Dolphins | Cristina 1395
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Dolphins Can Learn New Fishing Tricks From Their Pals : NPR
Amazon.co.jp: Dive into Adventure: Dolphins' Marvelous Tricks from Coast to Coast!: Dolphins in the Spotlight: Spectacular Performances at SeaWorld and Beyond : Reid, Jennifer Ashley: Foreign Language Books
Wild dolphins learn to "tail-walk" on the water, yet it's just a fad - Biology Online Archive Article