1. Dragon whiskers: A pair of tentacles is extremely important to arowana. Good arowana tentacles are vertical, and the ornamental value will be affected by the color and fish body, with twists and turns, broken whiskers and irregular tentacles.

2. Eyeballs: Big and bright eyes are the energy address of arowana, whose eyeballs are huge and stand out like searchlights.

3. Head: The epidermis on the top of the head should be as smooth and bright as possible, and there should be no wrinkles.

4, mouth: the upper and lower lips should be closed, if the jaw protrudes or has a tumor-like protrusion, it can not be said to be a good mouth shape.

5. Scales: The scales of arowana are large and regular, and they look very shiny. If it is mottled, it will be even worse.

Pectoral fin: Expand as much as possible, be regular, and be proportional to the body.

8. The last three fins: the vertical expansion of fin demand. The twists and turns are not interesting, and the caudal fin is relatively large, so it will not show the appearance of shrinking fin when it is reversed.