@OneManCollectiblez:
Eeeehm. No.
You see. Fishman Island actually IS 10.000 meters under the sea. And in this chapter they arrive at that dept. So it´s not a pun of Verne´s.
… Duh. And surume wasn't a reference either in any way, I guess, right? In that case, why not "10,000 meters deep" or any other equivalent formulation? But yeah, it's all just a series of coincidences.
... Point is, the last few chapters are heavily reminiscent of Verne (and you can't really avoid that when you're discussing adventures under the sea), so it's only natural to see this title as a reference.