This (mud volcanoes) is an interesting topic. Perhaps the authors of this recent (November 2021) "Biologically-oriented mud volcano database: muddy_db" publication might be able to help you: Article Biologically-oriented mud volcano database: muddy_db
(U.S. NIH NCBI PubMed has over 180 publications on mud volcanoes if you are interested = https://pubmed.ncbi.nlm.nih.gov/?term=mud+volcanoes ).