You have one butt, a shark has one butt, even a jellyfish has one butt/mouth, but deep inside sponges of Australia's Darwin Harbor there's a marine worm with BUTTS, hundreds and hundreds of butts. And sometimes those butts have minds of their own.

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#BizarreBeasts #worms #invertebrates #ocean #Ramisyllis

Sources:
https://www.sciencealert.com/thesean...
https://www.smithsonianmag.com/smart...
https://academic.oup.com/zoolinnean/a...
https://www.taxonomyaustralia.org.au/...
https://onlinelibrary.wiley.com/doi/1...
https://gizmodo.com/thiswormhas100...
https://animaldiversity.org/accounts/...
https://academic.oup.com/gbe/article/...
https://www.nature.com/articles/srep1...

Images:
Aguado, M.T., PonzSegrelles, G., Glasby, C.J. et al. Ramisyllis kingghidorahi n. sp., a new branching annelid from Japan. Org Divers Evol 22, 377–405 (2022).
https://doi.org/10.1007/s1312702100...
PonzSegrelles, G., Glasby, C. J., Helm, C., Beckers, P., Hammel, J. U., Ribeiro, R. P., & Aguado, M. T. (2021). Integrative anatomical study of the branched annelid Ramisyllis multicaudata (Annelida, Syllidae). Journal of Morphology, 282(6), 900–916.
https://doi.org/10.1002/jmor.21356
GLASBY, C.J., SCHROEDER, P.C. and AGUADO, M.T. (2012), Branching out: a remarkable new branching syllid (Annelida) living in a Petrosia sponge (Porifera: Demospongiae). Zoological Journal of the Linnean Society, 164: 481497.
https://doi.org/10.1111/j.10963642.2...
Aguado, M., Glasby, C., Schroeder, P. et al. The making of a branching annelid: an analysis of complete mitochondrial genome and ribosomal data of Ramisyllis multicaudata. Sci Rep 5, 12072 (2015).
https://doi.org/10.1038/srep12072

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