The calf was born Dec. 24. Observing researchers noted unusual unspecified behaviors by mother and calf that led them to worry for the young whale's health.

Tahlequah previously carried another dead newborn for 17 days in 2018. Here's what she's taught us about how orcas deal with death.

Tahlequah, an orca whale who carried her dead calf for 17 days in 2018, is grieving another loss. On Jan. 3, researchers confirmed that Tahlequah lost another calf and is once again carrying her baby's body through the ocean,