I know that Jacks get naturally skittish and shy later in life, but it's been such a dramatic change, and so quickly, that I don't know what to think. 90% of the time, when I enter the room, no matter how slowly or quietly, he freaks out to the point of hurting himself. He runs into the glass, jumps out of the water, and I'm sure is running into things in his frantic attempt to hide behind the filter or in one of his caves. It looks like he's missing scales and at some point, I can't imagine he won't seriously hurt himself with this bullsh*t.
Not happy...
/Mike