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Ever wondered what those white patches on whales are? You might think they're just weird skin growths, and you’re not wrong. But when you look closer, these patches are crawling with tiny stowaways! Learn all about these mysterious passengers in a new episode of SciShow, hosted by Michael Aranda! SciShow is supported by . Go to to get 20% off of an annual Premium subscription. SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at ---------- Support SciShow by becoming a patron on Patreon: ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Silas Emrys, Jb Taishoff, Bd_Tmprd, Harrison Mills, Jeffrey Mckishen, James Knight, Christoph Schwanke, Jacob, Matt Curls, Sam Buck, Christopher R Boucher, Eric Jensen, Lehel Kovacs, Adam Brainard, Greg, Ash, Sam Lutfi, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, charles george, Alex Hackman, Chris Peters, Kevin Bealer ---------- Looking for SciShow elsewhere on the internet? Facebook: Twitter: Tumblr: Instagram: ---------- Sources: Image Sources:
