Synx species belongs to Chimera Synx.

Check out the NoobAI version!
https://civarchive.com/models/1408390/synx-noobai

Should work well with any model based on Fluffyrock. I recommend Easyfluff 11.2.

Check out the Furry Diffusion Discord server: http://discord.gg/furrydiffusion

Should work with just synx, <lora:synx-v11:1.0>, but may work better with more tags:

synx, fluffy, white body, toothy grin, black lips, neck tuft, thick tail,
prick ears, 2 horns, black horn, red eyes, slit pupils, black claws

Other useful tags:

2 horns
5 fingers
black eye markings
black horn
black lips
curved horn
ears aside
ears back
ears down
finger claws
fluffy
long ears
mouth shot
neck tuft
no sclera
ridged horn
sharp claws
sharp teeth
slit pupils
straight horn
thick tail
tongue out
toothy grin
visible ribs
white body
white fur

I used teeth cupping to refer to the Synx ability to move and spread their teeth to look like a Venus flytrap - but it probably won't work due to small dataset.