All Water-drakes are agile swimmers who are capable of moving at speeds of up to twenty knots (about twenty-one miles per hour). They move almost silently and can squeeze through very small passages in reefs or cavern systems. Using its keen senses, including a sonar-like organ like that found in porpoises, it can locate its prey under the worst conditions. Then it strikes with a burst of speed, as well as an uncanny sense of precision.