 Shares of SeaWorld Entertainment Inc. were indicated up nearly 4 in premarket trading Thursday, after the theme park operator reported a second-quarter profit that more than doubled, while expectations were for a decline, as attendance increased to well-above forecasts. Net income rose to 127.8 million, or 1.59 a share, from 52.7 million, or 64 cents a share, while the FactSet consensus was for a decline to 32 cents a share. 