Ventral view of sea slug (shell-less marine gastropod mollusk, Peronia peronii, Onchidium peronii) at low tide Purple Island (Jazirat Bin Ghanim). Al Khor, Qatar, May 29, 2015
Hard shells of quahog mollusks on Horseneck Beach at evening. Westport, Massachusetts, November 22, 2003
Mud creepers (mangrove whelk, brackish-water snail, gastropod mollusk, Terebralia palustris) in mangroves area near Jazirat Umm Tays, barrier island at northern tip of Qatar, east from Ruwais. Qatar, April 12, 2013
Large gastropod fossil (sea snail, marine mollusk) Ampullina sp. (Ampullospira) of Dammam Formation in a site on flanks of Rawdat Al Heshaimiya(?) depression south from Trainah. Southern Qatar, November 6, 2015
Shells of a marine gastropod mollusk (sea snail) Clypeomorus bifasciatus at low tide in Jazirat Umm Tays, barrier island at northern tip of Qatar, east from Ruwais, March 24, 2012
Mangrove whelk (mud creepers, brackish-water snail, gastropod mollusk, Terebralia palustris) in mangroves area near Jazirat Umm Tays, barrier island at northern tip of Qatar, east from Ruwais. Qatar, April 12, 2013
Sea slug (shell-less gastropod mollusk, Peronia peronii, Onchidium peronii) at low tide Purple Island (Jazirat Bin Ghanim). Al Khor, Qatar, May 29, 2015