"No. It has never been required, I and mine see to the land normally, these seem to be unusual circumstances.." Xehanort is willing to bet humans don't wear whale shapes often. And the sea surely had its own guides, unless death for them worked very differently than for humans. He was going to have to ask when he finished here.

Maybe that was the purpose of that tremendous pale shark, and thus why he seemed to be one himself! "But fear not, I will not involve myself at all if my duty is not interfered with, though I would much like to observe." That ..reassurance, such as it is, isn't only for the whales, but also what seemed to be Apophis below. He's only here to collect the dead, and apparently observe an aquatic musical, not help the living in their fight, whale or serpent.