Merpeople were emerging on all sides now, watching him eagerly, pointing at his webbed hands and gills, talking behind their hands to one another. Harry sped around a corner and a very strange sight met his eyes.
From Red Caps they moved on to Kappas, creepy water-dwellers that looked like scaly monkeys, with webbed hands itching to strangle unwitting waders in their ponds.
The entire member seems a dense webbed bed of welded sinews; but cut into it, and you find that three distinct strata compose it: —upper, middle, and lower.