The autopsy revealed that Tango—who was the third calf of popular Juneau whale Sasha—had deep lacerations on its body and pectoral fin, thought to have been caused by a propeller.

Video footage shows the whale, identified as Smiley's young calf leaping out of the water in a majestic breach. It breached for almost 40 minutes.

A young endangered fin whale found dead on the Mendocino Coast earlier this month had blunt force injuries consistent with a vessel strike.. But just how the 40-foot whale died will never be truly ...