Assasi Trigger

i just got a Assasi trigger and put him in with my other fish
yesterday and also added 10 lbs of LR. I let the bag sit in the
water for 1/2 hr and then put him in he swam down then went
and layed in the rocks he came out once then went back into the
rock he dident come out when i was feeding eather and hes still
there this morning. Is this normal or is there something wrong
with him??????????
 
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