The neverending story

You are a dolphin.
You catch one last breath of air, before making your way below the warm current, towards the luminescent green glow.
The water gets colder the further down you go.
As you go deeper, you start making out buildings, growing out from the ocean bottom. Most are tall, strectching up towards the surface,(surfacescrapers?)
You also see other dolphins. And octopus. And sharks. And mermaids...mermen...merpeople.
You've arrived at an aquatic city, not unlike the tales of sunken Atlantis. It seems, the entryways to the buildings are near the top of each building, as well as the bottom.
You are nearing one of the tallest buildings, and off to your right is a small group of...beings, apparently in conversation.