The only pond found within the park boundary is located on the Roulette farm. It is fed by a spring that begins on the Mumma farm and runs east to this small wetland. Home to a few small-mouth bass and catfish, the pond also provides a habitat for various reptiles and amphibians.
Maine ocean islands provide the only nesting sites for Atlantic puffins in the United States. Eastern Egg Rock in the midcoast region, Seal Island and Matinicus Rock at the mouth of Penobscot Bay, and Machias Seal Island and Petit Manan Island off the downeast coast provide habitat for more than 4,000 puffins each summer.