Not all animals have a mouth, or even need one to eat! These different feeding strategies can teach us a lot about our ancestors and how they went from not needing a mouth at all to only eating with one. Hosted by: Hank Green SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at www.scishowtangents.org ---------- Support SciShow by becoming a patron on Patreon: www.patreon.com/scishow ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Kevin Bealer, Jacob, Katie Marie Magnone, D.A. Noe, Charles Southerland, Eric Jensen, Christopher R Boucher, Alex Hackman, Matt Curls, Adam Brainard, Jeffrey McKishen, Scott Satovsky Jr, Sam Buck, Ron Kakar, Chris Peters, Kevin Carpentier, Patrick D. Ashmore, Piya Shedden, Sam Lutfi, Charles George, Christoph Schwanke, Greg ---------- Looking for SciShow elsewhere on the internet? Facebook: www.facebook.com/scishow Twitter: www.twitter.com/scishow Tumblr: scishow.tumblr.com Instagram: instagram.com/thescishow ---------- Sources: Trichoplax adhaerens doi.org/10.1093/icb/icm015 doi.org/10.1371/journal.pone.0136098 doi.org/10.1038/nature07191 doi.org/10.1016/j.cub.2014.05.046 Bryozoans doi.org/10.1007/s12526-019-00948-w animaldiversity.org/accounts/Bryozoa/ doi.org/10.1666/13-029 doi.org/10.1111/pala.12189 Hydra vulgaris doi.org/10.1016/j.bpj.2016.01.008 doi.org/10.1002/bies.200800183 Paracatenula doi.org/10.1371/journal.pone.0034709 doi.org/10.1073/pnas.1105347108 doi.org/10.1073/pnas.1818995116 Hagfish doi.org/10.1098/rspb.2010.2784 doi.org/10.1038/srep00131 animaldiversity.org/accounts/Eptatretus_stoutii/ Images: commons.wikimedia.org/wiki/File:Trichoplax_adhaerens_photograph.png commons.wikimedia.org/wiki/File:Trichoplax.jpg commons.wikimedia.org/wiki/File:Trichoplax_revised_anatomy.png commons.wikimedia.org/wiki/File:Plumatella_repens_from_Haeckel_Bryozoa_drawing_Commons.jpg commons.wikimedia.org/wiki/File:Freshwater_Bryozoan234.JPG en.wikipedia.org/wiki/File:Polyps_of_Cnidaria_colony.jpg oceanservice.noaa.gov/education/tutorial_corals/coral01_intro.html www.inaturalist.org/observations/28006959 www.inaturalist.org/observations/33610065 www.eurekalert.org/multimedia/pub/110296.php?from=320887 www.eurekalert.org/pub_releases/2016-03/cp-itm030216.php commons.wikimedia.org/wiki/File:FMIB_50097_Hydra_vulgaris.jpeg www.eurekalert.org/multimedia/pub/197645.php?from=426129 vimeo.com/290672261 www.flickr.com/photos/dirtsailor2003/5562913211 en.wikipedia.org/wiki/File:Eptatretus_stoutii_1.jpg

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