To do the sign for "turtle" cover an "A" hand with a
"curved hand." (The "A" hand should be your dominant hand.
Thus, if you are right handed, your left-hand should be on top.)
Move the thumb of your "A" hand side to side a couple times as if
representing the head of a turtle.
You can learn American
Language (ASL) online at American Sign Language University ™
by Lifeprint.com © Dr. William Vicars