Yes she did. She told the seller that the green arowana will be put into a tank with a big silver arowana, the seller insist that silver arowana are afraid of green arowanas whatever the size and quoted that silver arowanas are the most kind of all arowanas in the world just why my sister thought its okay.Did you or your sister explain to the seller that you have a large arowana?......and if you still want to get another arowana you can set up a smaller tank in which to raise and grow the little guy until it is big enough to be safely housed with Dino.