Also, oh I see I need to answer a question, I'm definitely doing arapaimas and alligator gar together to adulthood into my future 20' by 10' by 5' deep aquarium cause I have seen youtube videos of fishkeepers in asia having this combination. So far it does work. The arapaima ruled the tank until i bought the big gar and there was this moment of the gar face to face with the arapaima and he made a U turn and started to swim side by side with the gar. Im very relieved and honestly those 2 have been buddies, often swimming together.