Fishing nets and rope were among the debris found inside the whale which stranded on the Isle of Harris.Read more
Whale and dolphin strandings
Experts say it is unusual for the animal to end up in these waters and away from its mother.
The 14-person strong wall encouraged the dolphins to sea after being stranded in a canal in Florida for days.
BBC Radio Cornwall
More than 250 whales, dolphins and porpoises have been washed up on Cornwall's beaches in a 12-month period - a figure the Cornwall Wildlife Trust describes as "sadly a record-breaking year".
Figures on cetacean strandings have just been released covering the seven-year period to the end of 2017.
Across the UK, nearly 5,000 mammals and fish were washed up in that period, including 21 different species of whales, dolphins and porpoises, as well as a selection of turtles and sharks.
Records for Cornwall and the Isles of Scilly have been kept for 27 years and, in 2017, there were 255 strandings - the highest figure ever recorded, the trust said.
The trust said the main reasons for the incidents was "entanglement in nets and other fishing gear", with marine animals founds with marks and wounds consistent with such entanglements.
Tents were used to protect the whales from sun exposure, as rescuers worked to get them to safety.