Mokuleia Bay, also known as Slaughterhouse beach (named after a slaughterhouse that once operated in the area) is part of a 45 acre Marine Life conservation district. Mokuleia Bay offers good snorkeling when the ocean is calm during the summer months, but is usually too rough during the winter.. The bay is adjacent to Honolua Bay and one can snorkel from one bay to the other when the ocean is especially calm..