Mystic Aquarium has released six seal pups in the waters off Charlestown after they were rescued earlier this year.
The harbor seal pups were rescued by the aquarium in April and May along the coast of Maine. Officials believe the pups were abandoned shortly after birth.
The pups - named Jett, Amethyst, Quartz, Obsidian, Amber and Sapphire - are between four and five months old.
They're now healthy and prepared for life at sea.