Aggressiveness of Goniopora

[Redland Reefer]

I have a green goniopora with long streaming polyps. Close by I've noticed my blasto contracting on the side nearest to it. The rest of the corals are doing great, so I'm not sure if the contraction is due to stinging. The polyps themselves don't make direct contact with the goni however. I was wondering if anyone had experience with the level of aggression of this coral or if they have any sweeper tentacles aside from the polyps or if they emit any toxins that may be causing any trouble.
SG 1.026
Alk 8.5
Ca 440
Nitrate 5
Phosphate 0.05
Mag 1400
pH 8.2

 

[BighohoReef]

Our goni's surround one of our frogspawns. I've never encountered WITHOUT direct contact that goni's sting or release anythingin to the water column. I would think that the blastos would be more aggressive. You die off is in a strange place as well.