The Smithsonian has blessed us with yet another irresistible ball of cuteness.

Just days after revealing an adorable red panda cub, the institution dropped another baby bombshell with pictures of a new family member, a sea lion pup born at the National Zoo.

Calli, a 14-year-old California sea lion, gave birth to the pup late last Sunday in a closed-off part of the zoo, according to a press release. For now, zookeepers say the pup looks healthy, and are “cautiously optimistic that it will thrive.”

But we’ll have to wait to find out whether it’s a boy or a girl—Calli and her pup will be bonding without human interference for the foreseeable future. “She’s a very experienced mother,” Jennifer Zoon, communications specialist at the National Zoo, tells DCist. “Keepers are observing the pair from a distance and they don’t see a need to intervene.”

In the wild, mothers wait a few weeks before introducing a pup to the rest of the colony. “It’s very important for the mom and the baby to form that bond in the weeks that follow after birth,” Zoon said.

Visitors won’t get to see Calli and her pup until late summer, she said. But for a heart-warming peek at the pup feeding and flapping behind the scenes, you can check out the Smithsonian’s Youtube channel.

Calli and her mate, an 11-year-old sea lion called Jetty, found each other through the Association of Zoos and Aquariums’ Species Survival Plan. It’s somewhat of an arranged marriage. The program matches breeding pairs for animals from zoos across the country to ensure “a healthy, genetically diverse and self-sustaining population.”

The pup is the fifth member of the Smithsonian’s sea lion colony, which includes Summer, Sydney, and Catalina. Catalina, the pup’s older sister, was born in 2016. She was the first sea lion born at the National Zoo in 32 years. The Smithsonian says it feeds its sea lions a healthy diet of frozen squid, herring, mackerel, and other types of fish, along with vitamin supplements.

Male California sea lions grow up to 8 feet long and weigh an average of 600 pounds, increasing to 1,000 pounds ahead of breeding season, according to the Smithsonian’s website. Females are significantly smaller, averaging 6 feet in length and 220 pounds.

They may look a little clumsy on land, but sea lions are phenomenal swimmers, traveling at speeds up to 30 miles per hour underwater. There are currently around 210,000 California sea lions across the United States, according to estimates.

Sea lions used to be widely hunted for fur, but they are no longer considered an endangered species. The U.S. population of California sea lions has more than doubled since 1975, according to data from the National Oceanic and Atmospheric Administration.