When, in nature, two little guys are benefiting off each other one way or another, we call that symbiosis. But, if you think about it too hard, you start to realize that everything in nature is benefitting off some other thing in nature somehow and come to the conclusion that all of Earth is a giant symbiotic relationship! To that I say: simply try not to think about it too hard!
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[Fact Off]
Figs and fig wasp cheating prevention
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1635526/
https://www.fs.fed.us/wildflowers/pollinators/pollinator-of-the-month/fig_wasp.shtml
https://news.cornell.edu/stories/2010/01/figs-kill-wasp-larvae-when-wasps-do-not-pollinate-figs
https://royalsocietypublishing.org/doi/full/10.1098/rspb.2009.2157
Magnetotactic bacteria in tissues of animals with magnetoreception
https://www.sciencedaily.com/releases/2020/09/200914112224.htm
[Ask the Science Couch]
Symbioses with more than 2 organisms
https://www.nature.com/scitable/knowledge/library/species-interactions-and-competition-102131429/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8331144/
https://pubmed.ncbi.nlm.nih.gov/17255511/
https://www.princeton.edu/news/2019/06/27/sea-slugs-use-algaes-bacterial-weapons-factory-three-way-symbiotic-relationship
https://www.purdue.edu/newsroom/releases/2016/Q3/yeast-emerges-as-hidden-third-partner-in-lichen-symbiosis.html
https://www.smithsonianmag.com/science-nature/what-drives-a-sloths-ritualistic-trek-to-poop-180949419/
[Butt One More Thing]
Crab that lives in sea urchin rectum
Picture: https://www.marinelifephotography.com/marine/arthropods/crabs/echinoecus-pentagonus.htm
https://scholarspace.manoa.hawaii.edu/handle/10125/11997
https://www.sciencedirect.com/science/article/abs/pii/S0022098178800070
https://askabiologist.asu.edu/sea-urchin-anatomy
