Today’s word is almost as long as an aye-aye’s fingers. I’m not sure you could describe it as slender though. (Are there slender words? That’s a topic worth pondering.)
In any case, aye-aye fingers are long, slender, & dextrous, & the lemur relatives’ impressive hand spans would probably give them quite an advantage at the keyboard, though most piano teachers would suggest a shorter manicure. More importantly, they are natural percussionists, with highly sensitive touch & hearing. So it is only slightly insane to imagine them tickling the ivory.
Prints of this painting, along with the original while it lasts, are available in my Etsy shop, Curious Art Lab.