a freshwater fish with a round mouth that attaches itself to other fish and drinks their blood Topics Fish and shellfishc2七鳃鳗(以口吸附于其他鱼体,吸食宿主血液) Word OriginMiddle English: from Old French lampreie, from medieval Latin lampreda, probably from Latin lambere ‘to lick’ + petra ‘stone’ (because the lamprey attaches itself to stones using its mouth).