I bought a tortoise which is 15 cms in length and has a type of a hook on its back.What is the specie?

Answers:
'Type of hook on its back'? Need a lOT more description than this. Sorry!

Try the gallery at http://www.tortoise.org to see if it can help.

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why did you buy it if you did not know what type it is. how are you going to know what to feed it. you should check out what thing are first.

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what kind of pet owner are you? you could have simply asked, WHAT THE HELL AM I BUYING? you dont deserve a pet

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It could be a sulcata tortoise http://www.tortoisetrust.org/care/csulca. http://www.petreptiles.com/sulcata/sulca.