You can speak, read, and write Tosculi and one other language of your choice (typically Southern)

One of your physical ability scores (Strength, Dexterity, Constitution) increases by 2.

One of your mental ability scores (Intelligence, Wisdom, Charisma) increases by 2.

You also take a –2 penalty to any one ability score. You may apply this penalty to the same ability score to which you gave a +2 bonus, granting you an overall +2 bonus to any one ability score.

Either:
Natural Armor.
Armor Class cannot be less than 11 + your Dexterity modifier no matter what armor you are wearing.

Or

Hardened Carapace.
Some hiveless tosculi develop additional defenses at the cost of offensive ability. Your Armor Class cannot be less than 11 + your Constitution modifier + your Dexterity modifier no matter what armor you are wearing. This trait also replaces the Gliding Wings ability.

You have proficiency with your claws, which deal 1d4 slashing damage.

Gliding Wings.
You take no damage from falls. You gain a fly speed of 40 feet but cannot hover. At the end of any round you fly, you must have descended at least one-quarter the distance you traveled or you fall.

or

Latent Hive Mind.
You know the message cantrip. This cantrip is a psionic ability that does not require components. The cantrip also functions in a silence spell.
At 3rd level you can cast the detect thoughts spell once, without the need for components, and you regain the ability to do so when you finish a long rest. This trait replaces the Gliding Wings trait.

Stalker.
You have proficiency in the Perception skill and Stealth skill.

or

Binding Spittle.
As an Attack action, you may spit a ball of viscous fluid at a target within 60 feet that is Medium or smaller. Make a ranged attack against the target with proficiency. If successful, the fluid hardens upon impact and the target becomes restrained. As an action, the target can make a Strength check against a DC equal to 8 + your proficiency bonus + your Constitution modifier to remove the condition. Anyone adjacent to a creature restrained by binding spittle may use their action to free the target in the same way.
Dealing an amount of bludgeoning damage equal to half your level plus your Constitution modifier (AC 10) to the spittle also frees the target. After you use binding spittle, you can’t use it again until you finish a short or long rest. This trait replaces the Stalker trait.

or

Bite.
Some hiveless tosculi develop the fierce mandibles associated with the warriors that defend their hives. You can make a bite attack as an unarmed strike that deals 1d6 slashing damage. On a successful hit with a bite, you may attempt to grapple the target as a bonus action. At 11th level, your bite damage increases to 2d6. This trait replaces the Stalker trait.