The Noahic flood destroyed all the air breathing animals except those on the ark. No doubt the flood also took a major toll on freshwater and marine organisms due to the turbulence, turbidity, changes in salinity and temperature. Some marine animals survived by simply tolerating changes in salinity. Survival of a marine reef fish, Blue Damsel, Abudefduf uniocellatus, was tested at different rates of freshwater dilution. It was found that the salinity where the fish lost the ability to swim was the same when exposed to dilution rates of 15 0/00/hrs (parts per thousand per hour) and 1.5 0/00/hr but was higher with the slow dilution rate of 0.031 0/00/hr. These data suggest that the marine organisms could not have survived a homogeneous freshwater deluge. A heterogeneous flood model was set up in a 55-gallon aquarium. A quantity of saltwater 20 cm deep was overlaid with freshwater and the system was exposed to outdoor summertime weather conditions in western Oklahoma. Marine algae (Phaeophyta and Chlorophyta), brine shrimp (Artemia nauplii), a hermit crab and some marine gastropods wee introduced int the saltwater portion. A goldfish (Carassius auratus), two mosquito fish (Gambusia affinis), and freshwater plants were introduced into the surface layer. Although some mixing occurred, all the organisms survived four week exposure to outdoor conditions suggesting that protected pockets of marine organisms may have survived the flood by being overlaid with freshwater.