This adorable grey seal pup is the National Aquarium's 150th release

The National Aquarium marked the release of its 150th animal on Tuesday, setting an adorable gray seal pup free in a Maryland state park.

The aquarium's animal rescue team got up at 4 a.m. to get ready to release the baby seal-- who is named Lily-- at Assateague State Park. They weren't alone, either. A crowd of supporters gathered to see Lily off. WATCH: CLICK ON THE VIDEO ABOVE! (Mobile users, click here to see it)

When caretakers opened her crate, Lily made her way right back into the water.

CLICK ON THE SLIDE SHOW ABOVE TO SEE PHOTOS (COURTESY OF THE NATIONAL AQUARIUM'S FACEBOOK PAGE)

Follow the National Aquarium on Twitter: @natlaquarium