The problem with saugeye is that they are hybrids and there is no set on the maximum size but in general they get larger than the sauger but smaller than the walleye. The saugeye grew faster than the pure parents. All walleyes, saugers and saugeye prefer low 70's but they makes very lousy aquarium fish due to their inactive and nocturnal lifestyle plus super picky eaters that can be fed with live foods only.