One of the fish stores I go to told me that it is better to blanch the shrimp because other wise it just passes threw them.blanching is only for a short time so it is still raw inside
never ever heard of that, and I've done quite a bit of research on rays. I blanch my own shrimp haha I just prefer the raw center. That really doesn't make sense though. just feed them raw. it'll be fine. and the fish (no matter ray or otherwise) will be getting more nutirents.
I am a cook so I know a thing or 2 about what happens when you cook food. most of the nutrients are destroyed, whether its partially cooked or not! just exposing the shrimp to that heat will destroy a lot of the nutrients
I would never cook any fish food, OUR bodies are adapted to cooked food, no other animals are. including all fish obviously. your rays won't get the proper amount of vitamins and nutrients if you keep cooking the food. and yes, you can use cooked food for a short period of time without messing up the fish.
BUT in the long run they will have nutritional defficiency
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