Diamond goby picking at coral

[jstew600]

I added an orange spotted diamond goby 3 weeks ago and now he likes to pick at my zoas(ripping small ones off) and even pulling small clumps of frogspawn off and spitting it out. Does this mean he is that hungry or just a habit? He's in a 120 gal reef tank and I feed half a cube of formula 1 and about same amount of brine shrimp buried in the sand every day. He eats them both completely.

 

[NanaReefer]

Get him a Pistol Shrimp buddy!! He'll stick close to home to protect it