Turtles
and tortoises are basically divided into two groups :
The
first comprising species that pull their heads into the
shell by retracting their necks into an s-shaped curve
and the second comprising freshwater species that hide
their heads by bending the neck sideways.
Turtles
adjusted to living in all types of environment , and can
be found in a freshwater or terrestrial habitat, and two
families in the sea.