 However, its teeth may have interlocked, much like those of the modern-day filter-feeding crabeater seal ("Lobodon carcinophaga"), which would have allowed some filter-feeding behavior.Its hunting behaviour was probably similar to the modern-day leopard seal ("Hydrurga leptonyx"), probably eating large fish.Like baleen whales, "Janjucetus" could not echolocate; however, it did have unusually large eyes, and so probably had an acute sense of vision.