Two orphaned Sea Otter pups, taken in only a few weeks ago, are bonding with caretakers as they continue to grow and build important otter skills at Shedd Aquarium’s Regenstein Sea Otter Nursery.

ZooBorns introduced the orphans in a recent feature: “Rescued Sea Otter Pups Get a Second Chance At Shedd Aquarium” 

Photo credit: Shedd Aquarium/Brenna Hernandez

Much of an otter’s behavior is not instinctual but is learned by watching mom. So, since mom isn’t around, the care team at Shedd is filling that role, providing food, helping the otters learn to groom their fur and more.

These are busy days for otters, which are naturally highly active to help them withstand the cold temperatures in their native waters. But the pups need their sleep as well, so the aquarium decided to share a few recent photos from naptime.

The aquarium is inviting fans to stay tuned for more milestone updates on the otters–including details on a media open house, potential naming opportunities, and info on when the public will be able to see them on exhibit at Shedd.