The Physical Impossibility of Getting a Shanghorn into a Glass Tank was a piece of art by the Venusian artist Radico Harstel. It was based on art from another planet, but using material from his own planet. It consisted of a Shanghorn in a fluid-filled container.
The Physical Impossibility of Getting a Shanghorn into a Glass Tank was kept in the Paloma Centre. It was used by the Eleventh Doctor to fool the Arucha, convincing them it was a weapon of some kind. After two years, they were unable to find a use for it and dumped it on an asteroid. (PROSE: The War of Art)