Space Elves: Yeah, yeah, yeah… (Says so right in the subtitle, see?)
Well, let’s just say that many, many years ago (say twenty) there was a lot more fantasy in my speculative-fiction worldbuilding, which didn’t quite wear off until somewhat fewer years ago (say ten). The remaining elvishness (see: Our Elves Are Better) of the eldrae is a combination of that part which I consider justified, and that part which is pure legacy code. (And that get their essential body plan the scientifically-justifiable way; see Human Aliens.)
And in the genre that brought us, say, the asari, the minbari, the vulcans, the syreen, etc., etc., and plenty of even physically closer-to-elvish examples, I’m not exactly worried about it, either.