What is the Arowana raising from fry game, how does it work?

According to the introduction of yamabus, Arowana raising from fry is a Simulation game on the Android platform. There is currently a 1.0 version released on Jan 15, 2018, you can see the details below.

The only application that can grow Arowana from fry fish to adults.
I'd like to keep Arowana, but if you need money in facilities and you can not keep it, let's grow Arowana easily.

■Let's give fresh food and grow beautifully.
If you give a food, Arowana will bite to Wild.
Let 's enjoy eating a lot of Arowana.
Depending on the type of food you give your body gradually changes color.
Let's raise it to your taste.

■Arowana will grow up even if you exit the application.
However, if you do not give food, Arowana will die
Let's feed for food once every 3 days.

■Escaping catches infinite amounts of time with the easy operation just tracing the screen.
Foods exceeding the limit possession number are cashed at points.

■In shop, you can purchase background and friends' fish using points and can mix in various combinations. Let's produce your own aquarium space.