Need help dont know what to do..... Acanatophylla

[Super Pets UK]

Just started go worried. I got ma coral 2 days ago and today it opened its mouth really wide i dont know what to do is that sign of stress or something else could you help me ??? What is going on my parameters are mg 1480 ca 450 kh 8.5 .... phosphate 0.04.... Photos below

 

[Sk8r]

acantophyllia- https://aqualifehub.com/acanthophyllia-coral-care-guide/ Your parameters are pretty good: I think I'd try target feeding it and seeing if it's nterested.