The two pieces of evidence that show Harborough considers the shark as belonging in the ocean are:
- “The shark was not passive, in the element, as I was; it was monarch of the waves, it could drive through them with the precision of a torpedo.”
- “Every movement of the shark was now plain to me; and it was moving, there was no doubt of it: a trail of bubbles streamed from its flank and a tiny streak of froth fluttered behind the fin.”
These statements highlight the shark's active and powerful presence in its natural aquatic environment, reinforcing the idea that it belongs in the ocean.