"Hexagonal arowana" has a very high regeneration ability, especially larvae, which can regenerate any severed limb within one month. With the growth, the regeneration ability will gradually weaken, and the limbs cannot be regenerated, but the epidermis or tissues such as fingers and toes can still be regenerated.
If it is a young fish within 1 year, it can grow new legs within one month.
If it is an adult fish over 1 year old, it will not grow new legs.
Hexagonal arowana is a blunt salamander with a wide head, small eyes and a large tongue, only two sides are free. The vomeroid teeth are arranged horizontally, some are far apart, and some are "M"-shaped. Widely distributed, north to southeastern Alaska and south to the Mexican Plateau.