If you haven’t seen this Arctic Watch Beluga Foundation clip already, it’s worth a few minutes. It’s footage of belugas and their calves frolicking in the shallow water of Cunningham Inlet, on Somerset Island, Nunavut (within the Lancaster Sound polar bear subpopulation, which is north of the Gulf of Boothia subpopulation region that I discussed previously here and here).
While I previously surmised that Gulf of Boothia polar bears might hunt beluga from remnant ice during the summer in years when the ice doesn’t totally melt (like they do in Hudson Bay, see belugas as food for hungry polar bears), it appears they also successfully hunt beluga in shallow waters like those found in Cunningham Inlet. But there is no hunting footage in this post.
Link and further info below, including a map and references on beluga, and polar bear predation on beluga in this region.