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Maru, YouTube’s Box-Loving Viral Cat, Dies at 18

His owners reported a lung adenocarcinoma diagnosis and a swift decline in a Sept. 6 message on the Mugumogu YouTube channel.

Overview

  • Maru’s family said he "went to heaven" on Sept. 6, confirming the news in a post on his official YouTube channel.
  • After tests at an animal hospital, the Scottish Fold was diagnosed with lung adenocarcinoma before his health quickly deteriorated.
  • Guinness World Records recognized Maru in 2016 as YouTube’s most-viewed animal with more than 325 million views.
  • The record later passed to Maymo the Lemon Beagle in 2018, though Maru’s Mugumogu channel grew to nearly 900,000 subscribers and over 577 million views.
  • Fans and followers are sharing tributes across social platforms, and Maru’s owner posted a personal message mourning the beloved cat.