Cephalopodian

Cephalopodian
ASI: Your Dexterity score increases by 2.
Age: ¯\_(ツ)_/¯
Size: Medium
Speed: Your base walking speed is 35 feet.
Cephalopodian Eyes. You have darkvision out to a range of 30 ft. You can't discern colors in darkness, only shades of grey.
Born with a Splattershot in One Hand and a Splat Bomb in the Other. You gain proficiency with Firearms.
Both Kid and Squid. As a bonus action, you can assume the form of an inky squid/octopus for up to an amount of rounds equal to your Dexterity modifier. While in your swim form:

You can move up to twice your movement speed in one turn.

You are unable to cast spells or take the attack action.

You can move through spaces as narrow as one inch without squeezing.

You can exit this form as a bonus action.
Inky Physique. You are unable to acquire a swimming speed by any means and always start drowning immediately when submerged in any amount of water. While submerged, after an amount of rounds equal to your Constitution modifier (minimum of 1), you are reduced to zero hit points.

Subraces:
Inkling

Your Charisma score increases by 1.

You gain proficiency in Weaver's Tools, if you don't have it already.

Lookin' Fresh! You can add +1 to your AC if you have a Charisma modifier of at least +1.

Octoling

Your Intelligence score increases by 1.

You gain proficiency in Tinker's Tools, if you don't have it already.

Octarian Smarts. You can add +1 to your attack modifier if you have an Intelligence modifier of at least +1.