Grief beneath the surface
It's not all that common to see footage of grief in wild cetaceans. My friend and colleague Alma Massaro sent me the link to this video of a mother cetacean grieving the loss of young. A translation of the Italian text goes as follows:
An adult cetacean carries the lifeless body of a youngster for hours on end. Alberto Gherli, from the White Wave Maldives, recorded this video in the Maldives archipelago. Looking at the condition of the young's body, it is possible to assume that the adult had cared to the young for days and nights—even the adult's body looks damaged by the sun. It is well-known that whales have an instinct to push inanimate bodies even if they belong to other species (as has happened to some shipwrecked people who have been helped by cetaceans). And this behavior is more expected to happen when a mother loses her child. This could be the case in this video but it is hard to confirm without a genetic analysis, as Elena Valsecchi says. However the differences in the size of the two bodies would suggest that they are a mother and her offspring. If this is the case, it shows that this behavior could last for a long period, as the decomposition of the youngster's body shows.