Bottlenose dolphins at the Planète Sauvage aquarium in Port-Saint-Père, France, sound like they are mimicking recorded humpback whale songs, reported Science.

If immersion is the best way to learn a language, the dolphins have their work cut out for them. Whale songs, seagull calls, music and other sounds play over loudspeakers in the park as the dolphins perform. But underwater microphones recorded the studious cetaceans working overtime, practicing at night what sounds like humpback vocabulary lessons.

Via Discovery News