sentences:  Once they reach over 10 cm in size, they move into deeper water where they prey predominantly on polychaetes, bivalves, ophiuroidea and brachyura.Studies have also shown there is variation in the diet depending on geographical location and to a lesser extent, season.Trumpeter whiting reach sexual maturity at a length of 19 cm in both sexes, having an extended period of reproductive development from October to April.