The BIG Pitch Competition announced Tuesday by Georgia Southern University and the Ocean Exchange may resemble the TV show “Shark Tank” but should be less ego-bruising. It might also look a little like Georgia Tech’s InVenture Prize, but will be open to students from many universities, not just one. As partners in the contest, Georgia Southern and the Ocean Exchange will be offering a $10,000 prize for the best pitch for a business-related new idea from teams of student innovators.