Before shooting the film, Katrina was formed in the deep sea Otters Club in Bandra. Training because the breath control and ability to maneuver at depths. Kats was so perfect that it can sit at the bottom of the deep pool.
During the shooting of the film, Katrina plunged into the sea and like a shark before it. The lady did not notice the danger, but the crew began to gesticulate general give a warning. But Katrina just swam around, dived, and came after a while.
Later, when the crew said the shark Katrina, I was petrified.