Feeding help!!!

[aceleri]

So i just target feed my LPS corals for the first time with some reef snow in my Biocube 14g. Immediately after feeding them my bubble and my frogspawn started secreting long white transparent strings from them that once long enough would break off and again. Almost looked like smoke.
is this normal ?
Please help

 

[aqua_dog]

Could it be feeder tenticles? I know when you feed and corals get a "smell" of food in the water they will extend feeders

 

[aceleri]

but do they break off, it looks like long strings of mucus???

 

[Clownemone]

It's either the reef snow or like u said, slime from the coral. My Euphyllias produce slime every time they get stressed. Make sure not to target feed too hard. See how it goes next time.