In this new teaser trailer premiere for the Finding Nemo sequel titled Finding Dory, the lovable but forgetful blue fish Dory (voiced by Ellen DeGeneres) is sleep swimming and talking in her sleep.

Nemo and his dad Marlin (Albert Brooks) find her and bring her back to her sleep chamber, but Dory swims off again. Later, Dory is astounded when she has a memory about her family.  She decides she has to find them.

Finding Dory opens in theatres June 17, 2016.