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 while made up as Bryan Ferry. The song was played on all the early Roxy Music tours and the instrumental passages were extended greatly, increasing the length of the song from 6:34 to sometimes over 12 minutes. On 18 February 1972, the BBC sessions aired a performance of over 11 minutes. During the Country Life tour the song was also performed, and the performance at Newcastle City Hall on 27 or 28 October 1974 was used for the 1976 Live album "Viva!". After 1975 however, the song was no longer played until the Roxy Music Reunion tour in 2001. If