Forward TRAVELLING SHOT through undersea canyon in the Caribbean Sea in Belize. Shot of school of fish in vicinity of the blue hole. LS of diver's light in the blue hole. Shots of stalactite against reflected light at 150 ft, edge of underwater cavern, the blue hole. Shot of school of jacks moving past. LS of divers entering blue hole. Various shots of edge of hole, stalactite. Shot of jelly fish, 50 ft down, of cloud of fish larvae, coral.