90798. Gallery. Click to enlarge. Click to enlarge. “. You fed the skyscale Gorrik's medicine. Hint: Find the ailing skyscale in Wing's Shadow. — In-game description.
"Skipping Stones" is a jumping puzzle located in Southsun Cove and has nothing to do with any of the Skyscale collections. Hint on the collection item tooltip refers to the correct JP, Spelunker's Delve. Simply renaming the collection item to "Skyscale Lost - Spelunker's Delve" should clear the confusion.