The zahn is one of the largest lizardwhales. This 14 m long solitary predator is large enough to swallow small wingsquid whole and tear fully grown mantasquid into pieces. Zhans attack just about anything big enough to fit between their enormous jaws, including seabirds, rays, sharks, swimming or wading dinosaurs, other lizardwhales and inflatable boats filled with marine biologists.   There have been at least two unfortunate incidents where Spec scientists have nearly ended up in a zahn's belly---they were apparently saved only by the foul taste of the boat.  After that, small rubber boats haven't been used in zahn-infested waters.