What is Aquasta natural astaxanthin

Perhaps this will answer your question.

Aquasta?- Natural Astaxanthin 
http://216.239.57.104/search?q=cache:eRchqPm6qLgJ:www.tateandlyle.co.uk/TateAndLyle/products_applications/product_brochures/americas/default.htm+Aquasta+natural+astaxanthin&hl=en

Astaxanthin is a naturally occurring nutrient that delivers
characteristic colour to the flesh of salmon and trout. It is
essential for salmon reproduction and increases resistance to disease.
Wild salmon obtain astaxanthin in their diet but it must be provided
to farm-raised salmon. Aquasta? is a natural product produced by the
fermentation of carbohydrates.
Contact Tate & Lyle Ingredients at (800)526-5728
Click on the image to the left to view our Aquasta? brochure. 
http://www.tateandlyle.co.uk/NR/rdonlyres/eg7hsqs6rm33245fdlricdnosxjk7n2h2o7xrsq5hyvf564f23kriia54ttyujfsqv557ffaymptjuxocope6w2j5gd/Aquastabroch28%2e10%2e03.pdf

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http://216.239.57.104/search?q=cache:2QtQvQNKhTgJ:www.wvu.edu/~agexten/aquaculture/Newsletters/Spring2004.pdf+Aquasta+natural+astaxanthin&hl=en

Another breakthrough for trout producers is the new natural way of
producing astaxanthin. Astaxanthin is the pigment used to get the
orange color into trout and salmon flesh. Just last year, trout
marketers were forced to label their product as containing pigment
additives for color enhancement. With this new process, a fermentation
using a strain of yeast, no special labeling will be needed. What is
even better is that this product (Aquasta tm) has already been
approved for use in foods in the United States.