lamprey

lamprey
[ˈlampri]
(pl. -eys)

an eel-like aquatic jawless vertebrate that has a sucker mouth with horny teeth and a rasping tongue. The adult is often parasitic, attaching itself to other fish and sucking their blood
七鳃鳗，八目鳗
Family Petromyzonidae: several genera and species
七鳃鳗科：数属，数种

语源

Middle English: from Old French lampreie, from medieval Latin lampreda, probably from Latin lambere 'to lick' + petra 'stone' (because the lamprey attaches itself to stones by its mouth)