My blue tang eat my O word clowns eggs

Is this normal ?

 

i would think that most fish will eat the eggs if given the opportunity. you would probably have to remove the eggs from the DT if you want them to hatch.

 

very normal... they are hunted by many fish/inverts

 

I agree, Normal. In nature, the clownfish lay eggs in an anemone and the anemone provides protection. You could add an anemone to your tank but there is no guarantee that your fish will adopt it (especially if they are captive bred). I have had limited success getting clownfish to switch homes by moving my rocks around.