Space Ace

(from amazon.jp):

~Episode 1: "The Conspiracy of the Kaijin Starfish" ~

In a corner of the universe, there is a planet called Parum, which is about to be destroyed by a natural cataclysm.

The Parum aliens form a group of spaceships and set out in a mass exodus in search of a new planet. However, Ace, a young boy, is thrown out into space because of his own mischief.

He eventually awakens from his long sleep to find himself at the bottom of the earth's ocean!