About 0.9 same as the flesh of most plants and animals. Water is 1.0000 at 4 degrees c. If you are asking how tough is gecko flesh, not nearly as tough as your toenails or armadillo outer skin.
was trying to build a mathematical model predicting the time required for ants to take apart animal bodies and only had data concerning the rate they did so with a gecko. so I needed to have some idea of the density to compare to other animal flesh types to decide if i needed to add a variable to account for that or not
this is sounds weird but i really need the answer.