I'd give it a chance, but keep a close eye on it.
Mine went into the overflow and I caught it when it was 3/4 the way through the teeth. I pulled it out, and it had lost about 1/3 of its flesh. In a week in was fine, and it looked similar to yours. But it did not have its insides come out.
I also found 3 pieces, the size of a dime to quarter, in the filter sock in my sump. 2 of them are growing/eating, and one disappeared into the rock.