Sorry was this question out of concern or curiosity?
It is skinny but its head size is also really small compared to the goldspotted despite being longer. From what I've seen and heard from other hobbiest species like the banded are quite skinny so I'm not overly concerned as it does eat well and regularly.
No - just curious, I've had a lot of trouble getting that genus of eels to acclimate to aquarium life. Good to hear yours is eating well!
Jay