Biology
Reproduction usually takes place in the spring in small brooks and streams. The adults afterwards die. The larvae are called ammocoetes and at first develop among the sand and gravel on the bed of the stream. They feed on detritus, insect larvae and small crustaceans that they filter out of the sediment. They undergo metamorphosis when about four years old. As adults, they feed on living or dead fish, gripping them with their small rasping teeth and swallowing smaller food items whole.
Read more about this topic: Carpathian Brook Lamprey
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