In 2018, a study made headlines when it found that a captive orca, or killer whale, was able to imitate human speech. The ...

“The whale shark has the smallest brain compared to body mass ... The researchers’ analysis revealed exactly how the killer whales, often hunting as a group, subdue the whale shark.

The geriatric killer whale could soon return to the waters off ... having outlived her tank-mate Hugo. He died of a brain aneurysm in 1980 after repeatedly hitting his head against his enclosure.