The Cobra sonar and radar monitoring station is run by a small putt putt generator. So to shut down the defenses this generator must be shut down. Duke avoids a shark attack by dropping his propeller backpack into the mouth of the shark and he turns around stabbing the shark causing it to bleed. On the island the sonar alerts the Cobras to the shark attack. They send in two Cobra Lamprey troopers on a Hydro-sled. Once they arrive they immediately jump in the water to discover the dying bleeding shark and several more circling them. The sharks attack all at once setting off more sonar alarms, which the Cobra forces then react to by sending all of the remaining Lamprey troops just leaving the Techno-Vipers to man the monitoring station.