Your Dexterity score increases by 2.

Glaucus Atlanticus reach adulthood in their late teens and live less than a 50 years

Your base walking speed and swimming speed is 30 feet.

The Blue Dragon Sea Slug Chimeras range from under 6 to over 7 feet tall and have slender builds. Your size is Medium.

Your diet can be literally anything. Your digestive system is full of acids made to decompose aliments and get rid of chemicals and poison and eliminate it through pores on your skin under a mucus state. Feel free to eat hot rocks, rotten flesh, magic items, bottles of poison if you wish, because your body will not be affected. This except story important items like just don't eat the keys to some dungeon because your character would do that or some fancy items that other party members desire, because you will make the DM and the other ppl at the table cry. The Glaucus Atlanticus Chimera also gets a minor cosmetic feature resembling the things you ate. This feature usually just affects the colour of the skin but it can also create cerata (search ceratra sea slugs) along parts of the body.

You can exhale a puff of air bubbles (10-foot cube) per short rest as an action (or multiple at the same time, at maximum of 4, at higher levels) which last for 1 minute. These bubbles shimmer with an iridescent blue light, creating a mesmerizing distraction. They then follow a track that you chose or stay in one place. You can after move the bubbles in another direction as a bonus action (if at higher levels you have multiple blue bubbles puffed, you can move all in any direction you wish as your bonus action, not an individual bonus action per blue bubble). Creatures of your choice within the cube must succeed on a Wisdom saving throw (DC equal to 8 + your proficiency bonus + your Dexterity modifier) or be charmed until the air bubble break. While charmed, a creature is disadvantage on attack rolls. Creatures that see through the bubbles can repeat the saving throw at the end of their turn, ending the effect on a success.

At higher levels, you can cast multiple air bubbles per short sleep. Every 3 levels, you get one more cast.

As a bonus action or as a reaction, you can touch a creature within your melee range or attacking you in melee combat. The creature must succeed on a Constitution saving throw (DC equal to 8 + your proficiency bonus + your Dexterity modifier) or take 1d6 damage based on your diet* and be pushed 5 feet away from you. You can cast this this 2 time before needing to eat something.

*Your skin creates poisonous mucus based on your diet. This means that for instance, if you eat poisonous mushrooms, your damage will be of the poison type. If you eat some electric eels, your damage will be of the electric type. Please bring this up to your DM so he will offer you things to eat that make sense to the place you are at or even have bottles full of things with you, because I find this quite a difficult thing to make on the get go. Also in theory you can have any type of damage but there are certain ones I could not find a type of consumable that makes sense to eat for that specific type, like thunder damage.

At higher levels, this ability increases its damage,  2d6 at 6th level, 3d6 at 11th level, and 4d6 at 16th level. Also, every three levels you get another 2 casts of this ability.

You can speak, read, and write Common and Aquan, as well understand the basics of Primordial.