An 18-year-old man who fell from a lobster boat in Lambert’s Cove off Martha’s Vineyard yesterday remained underwater for about two minutes before crew members pulled him out and revived him, according to the US Coast Guard. The Coast Guard said the crew of the boat Helen Irene reported that the man was pulled overboard at about 11:35 a.m. after his leg became entangled in a line. The crew revived him by performing CPR, the Coast Guard said. He was later taken to Falmouth Hospital. His condition could not be determined last night.