The invasive species of cambarid freshwater crayfish (Procambarus clarkii), also known as the red swamp crawfish, red swamp crayfish, Lousiana crawfish, Lousiana crayfish or mudbug, is native to nothern Mexico, and southern United States. In Europe P. clarkii is multiplying and actively colonising new terretory, at the expense of native crayfish and shocking moments inside Rebstockbad - a public poolsite in Frankfurt, Germany.