What specific large marine mammal has been documented preying on fully grown adult wolf eels?

Answer

Harbor seals.

While the wolf eel's reclusive nature and size offer protection, they are not entirely immune to predation, even in adulthood. The text specifically identifies harbor seals as predators that have been documented preying upon fully grown adult wolf eels. Furthermore, their young face a wider array of dangers from other fish species, such as rockfish and kelp greenling, which prey on eggs and juveniles.

What specific large marine mammal has been documented preying on fully grown adult wolf eels?
marine lifefishfactwolf eeleel