Ecco the Dolphin: Defender of the Future

At the dawn of the 30th Century, dolphins and humans had been together in a cross-species society for 500 years. Together, they had set out to explore space, offering peace and friendship to all who would welcome it. But space had its dangers; a violent species known as the Foe decided to conquer Earth.

However, the dolphins and humans drove them to the brink of defeat, and so the Foe sought vengeance on Earth.