Belonesox Belizanus are livebearers. They can be kept in freshwater and low end brackish water. They are non aggressive ambush predators who usually hide. The females grow to 9" at most and the males can grow to 4". Females will eat the males if there is not a lot of food. When raising the young, you need tiny livefoods for them to eat or else they will eat eachother/starve.
More info on the Belonesox link in my sig.