The 48 foot long fishing vessel Captain Kap went aground off the coast of Freshwater Bayou, Louisiana.   The shrimper began to take on water and the crew contacted the Coast Guard.   A helicopter was dispatched which was able to hoist the two crew on board.   No reports of injuries.   The Captain Kap went ashore later with no signs of any pollution being released.   The Coast Guard is conducting an investigation into the incident.