You people have lost your minds.
No I would not recommend keeping a Cali Ray in a 125gal, YES I have had a full grown cali ray.
Griffin-Half of those fish won't work with a stingray. They'll pick at it and then it will become infected, eventually leading to death. Also all of those fish will get far too large for a 125gal.
Lets clarify. The only reason I ever bought the two rays, or sharks for that matter, was because I ALREADY HAD A 980 GALLON WITH ALL OF THE EQUIPMENT READY TO RUN!!! People have seen my old tank and thought they could do it, too. This I assure you will lead to health and water quality disaster. The tank should be at least 6 feet long and as wide as you can go! 2 foot minimum.