In my case, after a while, the baby's almost killed their father. They needed constant feeding, and if not given enough, they start with eating the fathers slime coat and then ate a hole in his side. He would barely try o shake them off, and would have died if I had not removed him.
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Below a shot of the hole they ate in his side, taken after i removed him.
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With my haitiensus, the parents never harmed the fry, but the larger fry would kill and eat their smaller brethren.
I ended up with 3 or 4 different grow out tanks, different size fry in each.