This thread would've been better suited for the Biotest Supplement Advice forum.
3 caps 3 times a day isn't necessarily "too much", no. I've taken up to 12 or more per day (3-4 caps at a time) for short-term use when my joints are particularly acting up. Fish oil doing can be somewhat individual. Your body/stomach will let you know when you reach "too much".
Not sure what you mean about fat mobilization benefits.