Hello, I am a veritable Nano Nubie and have a dilema. I have a Leather Toadstool coral that appears to be having some problems. It appears that it may have been stung/bit by a brain coral I had next to it. I have since moved it away. There seems to be 2 white spots on the left edge, that are somewhat frayed, with stringy material hanging from it. Is this a bite/sting or stress?? Any comments would be appreciated.