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Pacific lamprey
The Pacific lamprey (''Entosphenus tridentatus'' or ''Lampetra tridentata'') is an anadromous parasitic lamprey from the Pacific Coast of North America, and Asia. It is also a member of the Petromyzontidae family. The Pacific lamprey is also known as the ''Three Tooth lamprey'' and the ''Tridentate lamprey''.
==Description==
Pacific lamprey grow to about as adults. They are anadromous and semelparous. They have slender, elongate bodies with two dorsal fins arising far back on the body. The anal fins are rudimentary and the lower lobe of the caudal fin is larger than the upper lobe and both lobes are continuous 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 water are brown. This species is distinguished by having three (or occasionally two) sharp teeth on the supraoral bar above the mouth and three sharp points on each lateral plate.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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