PORTLAND - Oregon Zookeepers chose the name "Molalla" for the new otter pup.
He's named after the river and will be called Mo for short.
Keepers said that they try to give the animals names from nations or cultures associated with their native habitat.
Mo's mom is Tilly -- after the Tillamook River. The pair are still in a private maternity den.
Keepers are baby-proofing the otter exhibit and hope to introduce Mo in a few weeks.