[Snake lover 3-25]

so i kept that turtle that i found sun april 26 it is sooooo cute!!! so my mom loves it but not it's smell... we got a filter, but it will only eat raw fish... is this a healthy diet for it to grow up on???? it shed and it is very active. we feed it as much as it will eat 2-3 times a day, my aunt is a big water animal lover and so my mom says that we have to give it to her and her sons for christmas... because it should be a bit bigger and more adapt to life inside by then.... i don't want it to go... but my aunt is retired and has wanted one for a long time so i think that she could probably take care of it a little better than me... i believe that it's a female, because it has a short thin tail and short front nails... is it's cage too small??? i read that it could be 1/4 the size of it's cage but... here are some recent pics...