Deep into the ocean even the slightest glimmer give you away. Which is why some fish have evolved to be so dark that they absorb any light that hits them. 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: 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, Scott Satovsky Jr, Charles Southerland, charles george, Alex Hackman, Chris Peters, Kevin Bealer ---------- 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: www.cell.com/current-biology/fulltext/S0960-9822(20)30860-5 academic.oup.com/icb/article/45/2/234/778309 www.annualreviews.org/doi/abs/10.1146/annurev-marine-120308-081028 www.annualreviews.org/doi/abs/10.1146/annurev-marine-010213-135018 academic.oup.com/icb/article/45/2/234/778309 jcs.biologists.org/content/121/24/3995 www.surreynanosystems.com/applications www.surreynanosystems.com/about/vantablack royalsocietypublishing.org/doi/pdf/10.1098/rspb.2019.0589 www.nature.com/articles/s41467-020-15033-1