Channel: The Royal Institution

Category: Science & Technology

Tags: riroyal institution

Description: Helping relatives is a common evolutionary trait, but there are some species that also help non-relatives and even strangers. What can the cleaner wrasse tell us about this type of cooperation? Subscribe for regular science videos: bit.ly/RiSubscRibe -- A very special thank you to our Patreon supporters who help make these videos happen, especially: Microslav Jarábek, Michael Rops, Adam Leos, Alan Latteri, Andrew McGhee, Anonymous, Ben Wynne-Simmons, Dave Ostler, David Lindo, David Schick, efkinel lo, Frances Dunne, Gou Ranon, Greg Nagel, Ivo Danihelka, Jeffrey Schweitzer, Joe Godenzi, John C. Vesey, jonas.app, Jonathan Killin, Kevin Winoto, Lasse T. Stendan, Martin Paull, Matt Townsend, Osian Gwyn Williams, Paul Brown, Paulina Barren, Rasiel Suarez, Rebecca Pan, Robert Reinecke, Roger Baker, Scott Edwardsen, Stephan Giersche, Supalak Foong, Taylor Hornby, Tim Karr, and William Billy Robillard. --- The Ri is on Patreon: patreon.com/TheRoyalInstitution and Twitter: twitter.com/ri_science and Facebook: facebook.com/royalinstitution and Tumblr: ri-science.tumblr.com Our editorial policy: rigb.org/home/editorial-policy Subscribe for the latest science videos: bit.ly/RiNewsletter Product links on this page may be affiliate links which means it won't cost you any extra but we may earn a small commission if you decide to purchase through the link.