HELP!!! FLOWERHORN SPILLING OUT FOOD!

I have a flowerhorn of approximately size 3 inches and he doesn't want to eat anything
HE shows interest in food when I go near the tank he takes them in his mouth and spills them out again.I have tried adding rosy red minnows,feeder guppies as feeders,bloodworms,frozen worms humpy head and common fish food but he takes them in mouth and spills them out.What to do now?His poop is also black which means he is fine.what shall I do?please help me!
Any kind of help will be appreciated.

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Here's his pic

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View attachment 1005851

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Thank-you so much follen for your reply!

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Here's his video.He is not sick at all
https://youtube.com/watch?v=vrkdSPe...JUAzw==&client=mv-google&gl=IN&guid=&hl=en-GB

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I have a smaller red dragon than this one and he eats like a pig.But this one's very choosy

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Yup
And thanks for your reply

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