Do not confuse 'Optimal' fish food with Optimal Foraging Theory. Optimal Foraging Theory has a history that dates back to 1966 (see link below). In its pure sense it relates more to an evolutionary concept rather than how we use it in this forum to describe fish feeding behavior (see links below). Bruce Condello first introduced forum members here to the Optimal foraging Theory as it applies to fish.
Ideal Optimal Foraging Theory (OFT)
http://www.jstor.org/stable/3565560?seq=1#page_scan_tab_contentsOptimal Diet Theory
http://www.sciencedirect.com/science/article/pii/S0003347200915926Optimal Foraging Theory Applied to Fish
http://link.springer.com/chapter/10.1007/978-94-011-7918-8_3 OFT in Bluegill
http://www.jstor.org/stable/1937507?seq=1#page_scan_tab_contentsOptimal foraging of smallmouth bass and crayfish
http://www.jstor.org/stable/1935078?seq=1#page_scan_tab_contentsOptimal foraging May Not Apply to Predator fish
http://www.tandfonline.com/doi/abs/10.1577/1548-8659(1993)122%3C0902%3AFTAPFA%3E2.3.CO%3B2
Disagreement Critical Review
http://www.jstor.org/stable/3565560?seq=1#page_scan_tab_contentsOptimal foraging and fear behavior
http://jmammal.oxfordjournals.org/content/80/2/385.abstract History of the Optimal Foraging Theory
http://link.springer.com/chapter/10.1007/978-1-4613-1839-2_1#page-1