Aug 14, 2017 · Fig. 1: Farmed production life cycle of Shiranus tilapia (Oreochromis shiranus) from a four-tank, BFT module producing up to 400 tons per year of 218-gram fish year-round. Shiranus tilapia reaches an average marketable weight of 218 grams in 189 days from hatching within a temperature range of 27 to 29 degrees-C.