It's normal. Or well. It depends on how big that portion of fish was and how it was cooked lol..
My sister & I did Dr. Joshi's Holistic Detox.. It was some pretty hardcore stuff - no wheat, gluten, or dairy, no red meats, no shellfish, no seafood except for like tuna and maybe salmon, no fruits except bananas, limes, & lemons, no condiments, only like detox tea or like San Pellegrino water, no tomatoes, potatoes, or other starchy veggies. And everything has to be organic. Oh, and -no- alcohol. For the 1st month.
It's pretty extreme, and the first few days, I felt really tired, but after that, I had tons of energy. I normally have a super slow metabolism and even 8 hrs. of sleep a night isn't enough for me, but after my sister and I got used to it, I could sleep comfortably for 4 hrs and be fine the next day. And, I ate like.. 1 Dorito chip and immediately felt the effects of the extra "chemicals" or whatever.
It's also expensive - since organic products cost more. But like for breakfast, I'd have a bowl of Puffins brand gluten free cereal with soy milk (following the serving sizes) & a banana. Lunch, I'd have a spinach salad with the vacuum packed albacore tuna, red onion, chick peas, and lime juice, Quaker Oats salt-free rice cakes or Broccoli & Carrots (both with organic hummus) for a snack and like plain grilled chicken with steamed veggies for dinner. It's also known as the "Alkaline Diet".
heh. Little O/T, but did you know that if you're -not- Lactose Intolerant, you're actually normal? People who -don't- have problems with milk are that way because of a genetic mutation in the genes. XD