I though sucker mouth catfish the minute I saw it. Would double check the heaters and probably remove any fish that could have the possibility of biting them.
Only other fish are archers and severums who never bother the rays. The heaters have guards on them as well but still a possibility. The flagtails are out now and just adding salt and raising heat. Hopefully see some improvement soon.
Still shocked at how much damage happened over one night
