A whale symbolizes channeling in a dream. A channel is someone who can communicate directly with spirits and Angels. Whales mean this because they are mammals, as are humans, but they live in the ocean. In dreams the ocean represents spirituality, so here we have an air breathing mammal that has adapted enough to travel into the spirit world. The type of whale involved is not important, although it is almost always killer whales that show up in dreams. In this context, the killer portion of the name shows the fear the dreamer has with regard to talking with the dead. Also their strong black and white color would indicate a difficulty the dreamer has with regard to accepting spiritual communication. In essence they must overcome their black and white attitude that tells them things are either good or evil. When you have this attitude it is difficult to open your mind to something new. This could be due to religious doctrine.