Potamon fluviatile icon in Malta following its legal protection in 1993, although not all scientists recognise the taxon. Potamon fluviatile Potamon fluviatile is a freshwater crab found in or near wooded streams, rivers and lakes in Southern Europe. It is an omnivore with broad ecological tolerances, and adults typically reach in size during their 10–12 year lifespan. They inhabit burrows and are aggressive, apparently outcompeting native crayfish. "P. fluviatile" has been harvested for food since classical antiquity, and is now threatened by overexploitation. Many of the island populations are particularly vulnerable, and the Maltese subspecies has become a conservation icon. A population
If This Is a Man not merely its lexical but also its inner faithfulness." Robert S. C. Gordon writes that Levi went on to develop a close relationship with Reidt. The German edition contains a special preface addressed to the German people, which Levi said he wrote out of passionate necessity to remind them what they had done. "If This Is a Man" is often published alongside Levi's second work of witness, "The Truce" (Italian title: "La Tregua"). The book is introduced by a poem. The construction "If .." invites the reader to make a judgment. It alludes to the treatment of people as "Untermenschen"