Regurgitate

tonmo

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well, they expel through their siphon, but not sure if that's what you're looking for. back out through their beak? hmm, not sure I've ever heard of that. seems plausible! Anyone ever experience this?
 

Analytoceras

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I just found in an article by Vallon et al. (2016, p. 10-11) under their ethological trace fossil category: digestichnia the statement, that also some molluscs including cephalopods, bivalves, and gastropods can produce regurgitates, i.e. they can vomit indigestible food particles. Can anyone here confirm these observation, because the authors do not provide additional references.

I am rather inclined to assume that cephalopods could not vomit, because all that matter has to pass through their brains. Any comment is highly appreciated

full reference: Vallon, L., Rindsberg, A.K., Bromley, R.G. 2016. An updated classification of animal behaviour preserved in substrates. Geodinamica Acta, 28: 5-20. (link: https://www.tandfonline.com/doi/abs/10.1080/09853111.2015.1065306)
 

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