There is an admission fee. The state agency office offers aquariums, and exhibits for children, as well as an informational video. Call for reservations.
Admission is free.
In May and June, when this site is open, visitors can get a birdseye view of ocean fish, as they move up the Merrimack River to spawn, through the center's underwater viewing window. Exhibits also touch on area history, water power, and fish migration. Guided tours are available. Admission is free. For ages 4 to adult.