Cool! Orcas Appear to Be Sharing Their Prey With Humans—but What Does It Mean?:

The researchers identified 18 different types of orcas “gifts,” ranging from several species of rays to a strand of seaweed. Other gifts included a green turtle, an ocean sunfish, a broadnose sevengill shark and an ancient murrelet. …

In nearly all of the cases, the orca appeared to wait for a response from the human after making the offering. Then, it either recovered or abandoned the gift.