Beginners ask for help Where are the pearl scales of so-called arowana?

Pearl scale refers to the tiny scales under the dorsal fin, which is one of the important manifestations to distinguish the species of arowana.

Juvenile arowana: full of pearl scales

B after young arowana: the pearl scales are partially luminous, but not completely full.

High-backed arowana larvae: pearl scales do not glow.

Jeweled arowana boy: Beads and scales will not shine.

When selecting arowana, we must observe the performance of its bead scales.