OK. I've found two petitions asking that Pizza be freed and for the Grandview Mall aquarium to be closed. And a Twitter link to one of the petitions. Please consider signing and sharing with others:

https://www.animalsasia.org/us/media/news/news-archive/the-tragic-polar-bear-that-suffers-for-selfies.html

http://www.thepetitionsite.com/310/188/594/demand-release-of-animals-kept-in-guangzhou-shopping-mall-in-china/

https://twitter.com/freedabear/status/760838081649991680