I love their poses - you nailed the way bodies float in the water fantastically! Very impressive. Their anatomies, the way their bodies entwine, the tension in their feet from the pleasure... The colours are also gorgeous and all the little details: the squid with the trunks, the grindylows, the fish trying to eat/clean Snape's foot from parasites.... Not to forget the amount of work to fill such a big canvas. Wow!
I apologize in advance for commenting about this but an obsession with sharks from the age of 4 on means I couldn't get over this, despite desperately trying: sharks in a Scottish inland water?! Uhm no, unless it's Viktor Krum part-transfiguring himself ^_^ The only sharks known to dwell voluntarily in freshwater are bullsharks, a tropical species that would only (literally!) be caught dead in the cold North Sea, let alone in Scottish lochs and lakes ^_~ That said, I still like the sharks! They look a lot like great whites, though the one seen fully in profile in the group has some kind of pattern in a different tone of grey on its back which makes it look like another tropical species: a tiger shark... Was this intentional? Yes, I checked out the details. I clearly think too much about this! I can't even concentrate properly on the Snarry-porn with the sharks in the picture. ^_^