In chapter 9 what did Aronnax see at the top of the undersea mountain?

In Chapter 9 of "Twenty Thousand Leagues Under the Sea," Professor Aronnax observes a remarkable underwater landscape at the top of the undersea mountain. He describes a vibrant ecosystem teeming with life, showcasing various species of fish, corals, and other marine organisms. The scene is both awe-inspiring and surreal, highlighting the beauty and mystery of the ocean depths that the Nautilus explores. Aronnax's observations deepen his appreciation for the wonders of the underwater world.