The older female walrus, in her 30s, died sometime in 2016 I believe before they moved the younger female to Washington to hopefully breed. When they moved Mitik, they said they planned to bring him back, but the population has not seen much growth, so may be difficult to do. I think the current thinking is that walrus may breed better in captivity in larger groups.Mitik has been gone for many years now I believe and yes he's in San Diego now. I thought they had two females or did one die? As much as I'm saddened to hear the aquarium has lost one of its two star species (and one which afaik isn't kept anywhere else in the northeast US) I never liked them in that enclosure as it seemed very small.
~Thylo