If you’re cruising the old building of Sydney’s Museum of Contemporary Art (MCA ) occasionally a panel or wall will open to reveal an Art Deco gem from the buiklding’s previous life as the Maritime Services Board building, like this frosted glass sea horse with it curlicue tail inset into an interior door.   Curatorial demands may mostly cover up framed views of the Quay, and glass sea horses but it is always worth peaking behind blinds, though this sea horse was out in openn waters.