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How i tell you the meat is very strong the structure is very similar to shrimp meat but the color is white and the taste is more near to a fish, the diference is it smell less than a fish, do not forget the reptiles are more acuatic animal than the others.
Thanks for your questions i hope answered you

Depends on the reptile. I think American Alligator tastes a lot like chicken.

Less aquatic species are more tough.

My suggestion is to skip reptile and go for frog. Frog legs are great if cooked right.

I was about to ask the same question.