The great mammals of the oceans, dolphins and whales are like intelligent aliens right here on Earth. They are intelligent and share their own language. Whales and dolphins may even be able to learn to speak to each other. It's been suggested that learning to better communicate with dolphins will help us better communicate with extraterrestrials, if and when we meet them.
It's no wonder that cetaceans frequently appear in science fiction. Often their intelligence has been given a boost - "uplifted" in SF terms - so that they can take their place beside humans.
This month the Biology in SF Free Fiction Directory highlights stories featuring dolphins and whales who communicate with humans in a variety of ways. Go check it out!
Photo: By IK's World Trip on Flickr