What is "playfish"

Playfish, currently a property of Electronic Arts, was a developer of free-to-play social network games. Playfish was founded in 2007 by Kristian Segerstråle, Sebastien de Halleux, Sami Lababidi and Shukri Shammas. It closed in 2013. Playfish in the past had attracted up to 55 million users a month, with over 37 million users coming from Facebook users. In October 2008, they secured US$17 million in venture capital funding from Accel Partners and Index Ventures.