Try the new AI-powered Infinite Story.

Fish Quest

You swim over to the mystic barrier. You search your limited knowledge and become aware that the world across the barrier is unknown, forbidden, and dangerous. The strolites have begun creating a world of oxygen, but fish have been limited to their acquatic domain. There is nothing else you can accomplish here at this time...

But, perhaps closer examination may yield further information. Do you observe the barrier and the immediate surrounding area for further clues?