What is Pacific lamprey?
{{Speciesbox | image = Pacific lamprey facing right.jpg | taxon = Entosphenus tridentatus | authority = ([[John Richardson (naturalist)|Richardson]], 1836) | synonyms = * ''Petromyzon tridentatus'' <small>Richardson 1836</small> * ''Entosphenus tridentatus tridentatus'' <small>(Richardson 1836)</small> * ''Lampetra tridentata'' <small>(Richardson 1836)</small> * ''Petromyzon ciliatus'' <small>Ayres 1855</small> * ''Petromyzon lividus'' <small>Girard 1858</small> * ''Petromyzon astori'' <small>Girard 1858</small> * ''Entosphenus epihexodon'' <small>Gill 1862</small> * ''Petromyzon epihexodon'' <small>(Gill 1862)</small> | synonyms_ref=<ref>{{cite journal |last1=Van Der Laan |first1=Richard |last2=Eschmeyer |first2=William N. |last3=Fricke |first3=Ronald |title=Family-group names of Recent fishes |journal=Zootaxa |date=11 November 2014 |volume=3882 |issue=1 |pages=1–230 |doi=10.11646/zootaxa.3882.1.1 |pmid=25543675 |doi-access=free }}</ref><ref>{{Cite web |last1=Froese |first1=R.| last2=Pauly| first2=D.| year=2017| title=Petromyzontidae| url=http://www.fishbase.se/summary/FamilySummary.php?ID=1|website=[[FishBase]] version (02/2017)|access-date=18 May 2017}}</ref> }} The '''Pacific lamprey''' (''Entosphenus tridentatus'') is an [[anadromous]] (reproduce up rivers) [[parasite|parasitic]] [[lamprey]] from the [[Pacific Ocean|Pacific]] Coast of North America and Asia. It is a member of the [[Northern lampreys|Petromyzontidae]] family. The Pacific lamprey is also known as the '''three-tooth lamprey'''. ==Description== Pacific lampreys grow to about {{convert|80|cm|abbr=on}} as adults. They move from the ocean up rivers to reproduce. and reproduce once before dying. They have thin, long bodies with two fins on its back starting far back on the body. The anal fins are simple and the lower lobe of the tail fin is larger than the upper [[wikt:lobe|lobe]] and both lobes are joined with the dorsal fin and the anal fin. Adults living in the sea are a bluish-black or greenish colour above and pale below, but those in fresh