Turtle mean different things to different cultures at different period of times. Some see it as Heaven, some look at it as Devilish. I like this one below:
Turtles remind us that the way to heaven is through the earth. In Mother Earth is all that we need. She will care for us, protect us, and nurture us, as long as we do the same for her. For that to happen, we must slow down and heighten our sensibilities. We must see the connection to all things. Just as the turtle cannot separate itself from its shell, neither can we separate ourselves from what we do to the earth.
It is believed that turtles will often leave a pool or pond before a draught arrives. This may be a warning of a change in climate.