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A mermaid’s mastery of the dolphin kick is key, along with equalization techniques to alleviate ear pressure under water.

In Afghanistan, he had started swimming freestyle and breaststroke events, but his coaches in Turkey persuaded him to learn the dolphin kick so that he could swim the butterfly.

Her legs are bent when her feet touch the wall, allowing for a powerful push and dolphin kick as she ricochets back the other direction.

The drag of the thick wet suit limited his flexibility and made it harder to execute a fluid dolphin kick.

He started the stroke with a scissor kick, then glided into a dolphin kick.