Visit Nantucket sea creatures, experience the Touch Tank, and join us for one of our hands-on family programs! Call for details and to register. Located on the shoreline of Nantucket Harbor, the Aquarium has been a favorite summer destination for locals and visitors alike since it was converted from a ticket office for the former Nantucket Railroad. Locally-collected specimens (released back into the wild at the end of the season) are on exhibit. Displays are always changing and include anything from seahorses to octopuses to sharks!