A dead humpback whale calf named Tango was found washed up near Juneau, Alaska, and an investigation is underway to determine if it was struck by a vessel.

The Coast Guard reported the dead 47-foot female humpback to NOAA on Sunday evening. It had washed ashore on the south end of Kruzof Island. The whale looked healthy and its belly was full of fish — most likely herring. But they did find some evidence of blunt trauma.

An alarming number of gray whales have been found dead this year from Mexico to Alaska, triggering a federal investigation into what’s causing the die-off.

Douglas Indian Association catalogs marine debris at the bottom of Gastineau Channel | Though it sounds like the subtitle to a Pirates of the Caribbean movie, ghost fishing is a real phenomenon. It's going on right now in Gastineau Channel.

Dead humpback whale