Potamon fluviatile crabs' unusual size, up to , and longevity (up to 15 years) are also interpreted as evidence of a long-established population, by analogy with island gigantism. On the island of Malta, "Potamon fluviatile" is rare and restricted to a few locations in the west of the island. On Gozo, there is a single population which inhabits a stretch of river only long. In the Balkan Peninsula, "Potamon fluviatile" is known to occur in Croatia, Montenegro, the Republic of Macedonia, Albania and Greece. There are four species of "Potamon" in the Balkans, and "P. fluviatile" is replaced by "Potamon ibericum" in
If There Is Something end section where Ferry's impassioned and melancholy vocals are set on top of a lush blend of backing vocals and the mellotron "three violins" tape set. It has been said that the first part of the song is a youth wondering about love, the second part adults in the heat of passion and the third part the singer in old age thinking about their past love. The song appears in the 2008 film "Flashbacks of a Fool" starring Daniel Craig where it features centrally in a scene where the main protagonist's younger self dances to the song with his girlfriend