Editing Marine worm (section)

==Reproduction==
Marine worms exhibit numerous types of reproduction, both sexually and asexually. Asexually many are able to reproduce via budding or regeneration. This regeneration is most notably studied in Plathelminths or [[Triclad]], known for being one of the earliest animals to be studied for its regenerative capabilities.<ref>{{Cite journal |last1=Egger |first1=Bernhard |last2=Gschwentner |first2=Robert |last3=Rieger |first3=Reinhard |date=2006-12-05 |title=Free-living flatworms under the knife: past and present |url=https://doi.org/10.1007/s00427-006-0120-5 |journal=Development Genes and Evolution |language=en |volume=217 |issue=2 |pages=89–104 |doi=10.1007/s00427-006-0120-5 |issn=1432-041X |pmc=1784541 |pmid=17146688}}</ref>  Marine worms will also sexually reproduce, internally and externally, with some releasing spawn into the ocean currents. This is in opposition to the much more internal and invasive method displayed by flat-worms called [[Penis fencing]] where hermaphroditic organisms will flight to try and impregnate their opponent while avoiding becoming impregnated.<ref>{{Cite journal |last1=Tong |first1=Samantha Jia Wen |last2=Ong |first2=Rene S.L. |date=June 2020 |title=Mating behavior, spawning, parental care, and embryonic development of some marine pseudocerotid flatworms (Platyhelminthes: Rhabditophora: Polycladida) in Singapore |url=http://dx.doi.org/10.1111/ivb.12293 |journal=Invertebrate Biology |volume=139 |issue=2 |doi=10.1111/ivb.12293 |s2cid=225782903 |issn=1077-8306}}</ref> This method is driven by the biological disadvantages (such as resource need and energy expenditure) behind carrying offspring instead of the more prolific gene passage through multiple impregnations.{{citation needed|date=October 2022}}