Editing Sea lamprey (section)

==Description==
{{broader|Lamprey|topic=general lamprey morphology}}
The sea lamprey has an [[eel]]-like body without paired [[fin]]s. Its mouth is jawless, round and sucker-like, and as wide or wider than the head; sharp teeth are arranged in many concentric circular rows around a sharp, rasp-like tongue. There are seven branchial or [[gill]]-like openings behind the eye. Sea lampreys are olive or brown-yellow on the dorsal and lateral part of the body, with some black marblings, with lighter coloration on the belly. Within their seven-year lifespans, adults can reach a length of up to {{convert|120|cm|in|abbr=on}} and a body weight up to {{convert|2.3|kg|lb |abbr=on}}.<ref name=fishbase/><ref name=":0">{{Cite journal |last1=Applegate |first1=Vernon C. |last2=Moffett |first2=James W. |date=1955 |title=The Sea Lamprey |url=https://www.jstor.org/stable/24944609 |journal=Scientific American |volume=192 |issue=4 |pages=36–41 |doi=10.1038/scientificamerican0455-36 |jstor=24944609 |bibcode=1955SciAm.192d..36A |issn=0036-8733|url-access=subscription }}</ref>

===Etymology===
The etymology of the genus name ''Petromyzon'' is from ''[[:wikt:petro-|petro-]]'' "stone" and ''[[:wikt:μυζάω|myzon]]'' "sucking"; ''marinus'' is Latin for "of the sea".