Dolphins may sleep talk in whale song

Dolphins may sleep talk in whale song
http://www.livescience.com/18074-dolphins-sleep-talk-whale-song.html

A group of five dolphins that were born in captivity have been mimicking whale song in their sleep. The dolphins only hear whale song on a few parts of a twenty-one minute long track that plays during their performances and show no indication of trying to mimic the whale song before or after the shows. But during the dolphin’s period of rest between midnight and three a.m. the five dolphins can be found mimicking the whale song. While this could have been only a few incidents, researchers proved that theory wrong by observing the dolphins for nine days and eight nights to make sure, and there were twenty-five recorded incidents of the dolphins sleep singing in whale.
This is amazing maybe they will start doing other things in their sleep as well as singing.
This could affect dolphin researchers around the world as they try and figure out this phenomenon.