Feelers. You have a set of feelers around your face that allow you to sense movements on surfaces. In order to utilize this trait, you must fully concentrate on this task, placing your face next to the surface you intend to feel. This gives you Tremorsense for 30 ft. You can't take other actions while feeling, except for reasonably easy tasks at your DM's discretion.

Toukka Resilience. You have resistance to poison damage, and you have advantage on Saving Throws against being poisoned.

Defensive Pheromones. When wounded, Toukkas release nauseating pheromones to disorient opponents. Whenever you take damage, you may expend your reaction to force a creature within 5 feet of you to make a Constitution Saving Throw, dealing 1d6 poison damage on a failed save; the damaged target can't take reactions until the end of your next turn. Pheromone damage increases to 2d6 at level 10. You may use this feature a number of times equal to you Constitution modifier (minimum of 1)

Natural Armor. Toukkas' tough scales grant them a natural armor of 13+Dexterity modifier. Toukkas can't wear regular armors unless time and money are spent to make them able to fit their peculiar anatomy. Time and cost are at DM's discretion.

Empathic Telepathy. You know the Message cantrip. This used to be the main method of communication among Toukkas. You may also cast Sense Emotion without verbal components. It does not count against other spells you may know or have prepared. You may use this feat only once per short or long rest.