Looks fine other than being a bit skinny. Is the tail damaged ? If so is it healed properly ?
Either way I would feed it some chopped worms and try fatten it up that way. When its eating better it will get some colour back.
2 worms a day is way under feeding even for a small ray my group of 4 can demolish 50+ a day u can feed them till they r visibly bloated........probably basically malnutrition
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