Petromyzon (Lamprey): General Characters Introduction: Lampreys are Anadromous or freshwater, Eel-shaped jawless fishes. They can be readily recognized by the large, rounded sucker which surrounds their mouth and by the single nostril on the top of their head. Systemic position of Petromyzon: Phylum: Chordata Sub Phylum: Vertebrata Group: Agnatha Class: Cyclostomata Order: Petromyzontiformes Family: Petromyzontdae Type: Petromyzon (Lamprey) Habit and habitats of Petromyzon It has been known for a long time that the sea lamprey breeds in freshwater. However, it does not enter all the streams within its range indiscriminately.…
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