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well these are two new musk turtle that i got from my uncle that found them in his yard. he knew that i have a couple of turtle so i went and got them. have a look and let me know what you all think. like i said i beleave that there razor back musk turtles.

Yes they are. Your going to want to get rid of that gravel before they choke.

Also:

http://www.austinsturtlepage.com/Care/cs-razrbk.htm

Beautiful coloring on the pic!

Ditto on Linus' comment re: the gravel
If they don't choke, it can affect their digestive system.

That's colored sand. I don't use gravel. I have sand in my 75 gallon with my res and map turtles. I didn't think the sand would bother the musk turtles

Looks more like smaller gravel, but I trust you.

ultimately its your choice what you do, of course, but i would take the current substrate out; like said.
because whatever the name of the substrate is, it looks big enough for your turtle to choke on. especially if he takes a gulp-full. so i would opt for a bare bottom tank or switch your current substrate to sand.
better safe than sorry.