I have the same kind of turtle in a forty gallon tank in my house right now i have a male and female that look just like that and they have layed 4 eggs this year but just a couple of days ago i caught a new turtle that seems to be a musk turtle and florida box turle hybrid it can swim fantastic but can close only the front of its shell up like a box turtle and has a different shell pattern than the other turles but it is much larger