turtles are slow and they can get old. are large, and heavy, and they can attack with an impressive speed. They are usually instructed to signify danger, or adventure. But they may also be choosen to illustrate the power of computers. come most regularly as whales or dolphins and often breach to a better life. Whales sometimes symbolize an unspoiled environment that must be preserved while dolphins stand for intelligence and communication. Pinnipeds are less popular and haven't much of great value to tell.