The Amazing Aquarium at Dragonara Beach

From the introduction: This adventure is intended for a party of three to five level two characters. It takes them on a dungeon crawl in search of treasure, meeting curious creatures along the way. It will take the players around three to four hours to complete the adventure. ... A long time ago the wizard Nescio founded a small wizard’s academy near the town of Dragonara. It was called The Aquatic Society of Dragonara and had as its goal to research the sea and its denizens. Of main interest were the arcane phenomena pertaining to merfolk.