You gain +1 Dexterity and +2 to either your Intelligence or Wisdom... Assuming I can figure out how dropdown menus work.

Octopi reach maturity after one year, and live no more than a decade.

Octopi might have an innate tendency toward evil, as many of them end up there. Evil or not, an independent nature inclines many Octopi toward a chaotic alignment.

Octopi are about 2 feet tall, though their tentacles compensate to provide normal range. Your size is Small.

As such, you have disadvantage to use Heavy weapons, and can use Medium creatures as mounts.

Your base walking speed is 35 feet. However, for every object you hold, decrease this by 5 feet, to a minimum of half your base speed.

Thanks to your deep-sea adaptations, you have superior vision in dark and dim conditions. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.

You can squeeze into spaces one size smaller than your size. You can move through spaces occupied by creatures larger than yourself. However, due to your nonstandard physical build, you must use special barding instead of normal armor, which weighs twice as much and costs four times more than normal armor.

You can speak, read, and write Common and Abyssal.

You resist Cold damage. While not submerged, you are weak to Fire. Also, you can breathe underwater.

You have advantage on Grapple checks, and you have advantage on all checks against a Grappled creature. You may use each tentacle to wield a weapon or shield, or two tentacles for two-handed weapons. Wielding additional weapons does not provide additional attacks for multi-wielding.