What happened to the rare left handed shell that Arronax found?

In Jules Verne's "Twenty Thousand Leagues Under the Sea," Professor Arronax discovers a rare left-handed shell during his underwater adventures. However, despite its beauty and uniqueness, the shell ultimately becomes a symbol of the fleeting nature of life and discovery in the novel. At the end of the story, Arronax reflects on the shell, acknowledging that it is now lost to the depths of the ocean, much like many of the experiences and wonders encountered during their journey. This emphasizes the themes of loss and the transient beauty of the natural world.