Editing Hydrogen sulfide (section)

===Animals===
Hydrogen sulfide is lethal to most animals, but a few highly specialized species ([[extremophile]]s) do thrive in habitats that are rich in this compound.<ref name=Tobler2008>{{cite journal |last1=Tobler |first1=M |last2=Riesch |first2=R. |last3=García de León |first3=F. J. |last4=Schlupp |first4=I. |last5=Plath |first5=M. |date=2008 |title=Two endemic and endangered fishes, ''Poecilia sulphuraria'' (Álvarez, 1948) and ''Gambusia eurystoma'' Miller, 1975 (Poeciliidae, Teleostei) as only survivors in a small sulphidic habitat |journal=Journal of Fish Biology |volume=72 |issue=3 |pages=523–533 |doi=10.1111/j.1095-8649.2007.01716.x |bibcode=2008JFBio..72..523T |s2cid=27303725 }}</ref>

In the deep sea, [[hydrothermal vent]]s and [[cold seep]]s with high levels of hydrogen sulfide are home to a number of extremely specialized lifeforms, ranging from bacteria to fish.{{which|date=June 2015}}<ref>{{cite journal|last1=Bernardino|first1=Angelo F. |last2=Levin|first2=Lisa A. |last3=Thurber|first3=Andrew R. |last4=Smith|first4=Craig R. |date=2012 |title=Comparative Composition, Diversity and Trophic Ecology of Sediment Macrofauna at Vents, Seeps and Organic Falls. |journal=PLOS ONE |volume=7|issue=4|page=e33515|doi=10.1371/journal.pone.0033515 |pmid=22496753 |pmc=3319539|bibcode=2012PLoSO...733515B|doi-access=free }}</ref> Because of the absence of sunlight at these depths, these ecosystems rely on [[chemosynthesis]] rather than [[photosynthesis]].<ref>{{cite web|work=Marine Society of Australia|url=http://www.mesa.edu.au/deep_sea/hydrothermal_vents.asp|title=Hydrothermal Vents|access-date=28 December 2014}}</ref>

Freshwater springs rich in hydrogen sulfide are mainly home to invertebrates, but also include a small number of fish: ''[[Cyprinodon bobmilleri]]'' (a [[pupfish]] from Mexico), ''[[Limia sulphurophila]]'' (a [[poeciliid]] from the [[Dominican Republic]]), ''[[Gambusia eurystoma]]'' (a poeciliid from Mexico), and a few ''[[Poecilia]]'' (poeciliids from Mexico).<ref name=Tobler2008/><ref>{{cite journal|last1=Palacios|first1=Maura |last2=Arias-Rodríguez|first2=Lenín |last3=Plath|first3=Martin |last4=Eifert|first4=Constanze |last5=Lerp|first5=Hannes |last6=Lamboj|first6=Anton |last7=Voelker |first7=Gary|last8=Tobler|first8=Michael |date=2013 |title=The Rediscovery of a Long Described Species Reveals Additional Complexity in Speciation Patterns of Poeciliid Fishes in Sulfide Springs.|journal=PLOS ONE |volume=8|issue=8 |page=e71069|doi=10.1371/journal.pone.0071069 |pmid=23976979 |pmc=3745397|bibcode=2013PLoSO...871069P|doi-access=free }}</ref> Invertebrates and microorganisms in some cave systems, such as [[Movile Cave]], are adapted to high levels of hydrogen sulfide.<ref>{{cite journal |last1=Kumaresan |first1=Deepak |last2=Wischer |first2=Daniela |last3=Stephenson |first3=Jason |last4=Hillebrand-Voiculescu |first4=Alexandra |last5=Murrell |first5=J. Colin |title=Microbiology of Movile Cave—A Chemolithoautotrophic Ecosystem |journal=Geomicrobiology Journal |date=16 March 2014 |volume=31 |issue=3 |pages=186–193 |doi=10.1080/01490451.2013.839764 |bibcode=2014GmbJ...31..186K |s2cid=84472119 }}</ref>