The killer whale mother, who made headlines with her display of grief in 2018, has given birth again. But researchers have some worries for her new offspring.

The whale, known to the world as Tahlequah, gave birth to her second calf since 2018, when she carried her dead newborn for more than two weeks.

An orca who captured the world’s attention in 2018 after she carried her dead newborn calf for weeks appears to be a new mother again, bringing a sign of hope to researchers.