Ning found pieces of metal broken off from the side of the spaceship. The 'fins' the people had seen were giant metal arms of the spaceship, of which half of them had been destroyed already.
The spaceship was far bigger in person than he could have imagined. It was cylindrical in shape with half of its outer arms around it. There was an opening at the back for the thrusters.
The front of it was still under the sand.
Once Ning pulled the entire spaceship from the sand, he teleported it onto a deserted island and put it there.
He looked at it from top to bottom. The ship was so massive that perhaps 5 of those giant turtles he had summoned could fit into it.
And that was after most of it had been destroyed.
The spaceship he remembered seeing so majestic in his memory was now completely crushed on all sides. The glass screen on the front was fully broken in and water had completely filled the spaceship.