Is marker ink poisonous to a box turtle?

Question

i have a box turtle that my sister and her feansay found in the middle of the road and i am going to sell it or let it go if i let it go i want to put a number on it so if i ever see it againill know it was mine

Answer 1

We had a box turtle for years and used nail polish to paint our phone number and the turtles name on the shell.  Totally non-toxic and won't wear off as easily as marker.  Try nail polish.

Answer 2

the ink is probably ok as long as its non toxic, but it might come off just from being soaked in water when the turtle swims or from the weather.even permanent marker isn't that permanent. nice idea though.