Story highlights Dolphins may communicate in different pulses which resemble words and sentences

But scientist says more, open-water testing will be needed to confirm dolphin language

(CNN) A conversation between dolphins may have been recorded by scientists for the first time, a Russian researcher claims.

Two adult Black Sea bottlenose dolphins, named Yasha and Yana, didn't interrupt each other during an interaction taped by scientists and may have formed words and sentences with a series of pulses, Vyacheslav Ryabov says in a new paper.

"The (pulse) exchanges reminds us of an exchange with sentences between two people," Ryabov told CNN.

Joshua Smith, a research fellow at Murdoch University Cetacean Research Unit, says there will need to be more research before scientists can be sure whether dolphins are chatting.

"I think it's very early days to be drawing conclusions that the dolphins are using signals in a kind of language context, similar to humans," he told CNN.

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