Possible Clues:

• Fish tanks or buildings containing them
• Colour taking over current marine habitats
• Features of many doctor's office waiting rooms
• Some tanks
• Answer question over Arabs once Iraq regularly reveals tanks
• With a couple of pints almost tops up water tanks
• Tanks answer as artillery surrounds one
• Locations in which to find Jacobs' urchins, Cooper's lions?
• Tanks in piazza stripped, one occupying area after evacuation
• Some public exhibits