A headless blue whale carcass that washed ashore in Mexico's Baja California was buried on Thursday on the beach where it was found.
The head-less carcass, about 22 metres (72 feet) long and weighing an estimated 40 metric tonnes (44 tons), was found on Wednesday near Ensenada.
Government oceanographer Arnulfo Estrada Ramirez told the Azteca television network that it wasn't clear how the whale died.
"It is likely that it died far away from the coast, this species lives further out in the ocean," he said.
After burying the whale on the beach, authorities alerted beach-goers not to swim in the area.
Three other dead blue whales were found off the Southern California coast in the past two weeks.
About three thousand of the world's 12-thousand blue whales are believed to migrate north in summer to north Pacific feeding grounds, where they eat about four tonnes (4.4 tons) of krill per day, putting on fat for the winter.
In winter, the group migrates south to calving grounds off Mexico and Costa Rica.