Israeli artist David Gerstein has become one of the most recognisable names in contemporary sculpture and painting. Known for his vibrant, layered metal works and joyful subject matter, his influence stretches far beyond his Tel Aviv studio. But behind the bright colours and familiar imagery lies a practice full of unexpected detail. Here are nine things you may not know about him. 1.  Singapore sparked the koi fish series The idea for Gerstein's iconic koi fish works originated right here in Singapore. He was so captivated by the pools of koi fish he encountered that the concept took hold and he developed an entire series around the subject. So taken by the imagery that he went on to build a dedicated pool in his own studio, allowing him to observe the fish and lotus at close range as he worked.…