To dream of an orca symbolizes doubt and disbelief in motives.
A whale of any sort in your dream is a sign of protection and help and if you see the flukes of his tail you will have much good luck.
To dream of an orca, also known as a killer whale, shows the dreamer is not sure of the motives of his/her protector.
The ‘killer’ whale then represents distrust and must be viewed in that light by the dreamer.
To see an orca in your dream signifies distrust and suspicious motives.