I have a 14" Protopterus dolloi. i have a tank for him but i would like to put him in my bigger one. will he eat the other fish. they range from 5" to 10". oh and what is a good thing to feed this guy and how fast will he grow. Is this a rare lung fish or a more common. I also have 6" Protopterus aethiopicus congicus. anyone ever had this one. could i put him with the big one, prob not. but i have seen pics of peoples lungfish with other smaller fish and smaller lung fish but not the kind i have