all arowana’s are like that when they are little. They have full 360* view out of each eye, including up to 6 feet out of the water. They are known for jumping 6+ feet, to get a bug off a branch or leaf.
but my second one, The jardini arowana was 4" when I got him, now he is about 8-9". Had him for about 5 months. Maybe less. He will be full grown under 30". They dont get nearly the length of my big silver one in the first pic, but they get twice the girth.
here is one over half grown eating a mouse…