If you think of the oceans of the world, you will find they are as vast and mysterious as the Universe, even with the second Universe that is slowly coming into view. The bodily makeup of the dolphins - which are the same family as whales,- are such that their senses let them travel across the denseness of the ocean bed and meet up with their family. Are these the aliens that you talk about? Beings from another world? For it is a different world that they live in and one that you cannot live in, any more than they can life in yours.
Stop to think how sensitive the dolphins are! Scientists tell us that their brains are larger than humans, and many people say they have healing powers. This is probably because they have evolved more because they live in this environment of the undersea world. They speak to each other but at such a speed and high pitch that human ears cannot hear, but their energies are such that we can hear them as we hear all things of nature - even to the tiniest sparrow.
The dolphin knows that when they are diving up and down in the water amusing the crowds, they are making a few contacts and spreading some good thoughts around the world, but only with people who have a sensitive heart, who are walking the path of enlightenment and who have opened their hearts and minds to see and feel all the higher vibrations of this world.
It could be a message to reach out to everything good in this world and, to that which is not good, change the vibrations by powerful thought. Think of the dolphins with such a powerful body and such a sensitive mind and imagine the power of your mind and all the energies, which are not being used yet. Think also of when the time comes for all people to put those energies into a force of love towards all others - to make us part of the whole and as one with God.