So far, the changes are a good step in the right direction. I would personally put reproduction as the bottom most one and have it be after internal biology, since I think that is more important, but again, that is personal preference. As Sigma points out, you'll likely need to play around with the header levels a bit until you get the layout to be just right. This is assuming it isn't a portion meant to house even more info and simply just encompasses everything underneath it of course.
My main problem, as it was then, is with the biology. When I initially looked into this, I was amicable to the idea; the further I went and the more deeply I looked into it, the more it seemed to me there was no real understanding of how the Raiken actually work. What I see in this article is the 'what', or end result, rather than the 'why', or what causes all the end results in the first place. Initially, this made me drop my jaw, amongst other things. What needs to be done is to explain how the Raiken really works - what's on the surface is all quite unique and interesting at a glance but, it all falls apart under scrutiny. I actually have a little bit of bio background; with other alien species, they just use what we do, so don't need much more work, but this is something drastically different and therefore needs explaining. So far, what I see doesn't make any sense.
To start with, the Raiken article emphasizes their high heat and thermal emissions, which are necessary to keep them active. For humans, heat is not what keeps any of us going, but is instead the waste, or byproduct of the actual thing that keeps us going - chemical reactions. It just happens that the heat produced keeps us at the ideal temperature for said chemical reactions. For the Raiken, their equivalent for muscles for an example, are electropolymers. This is very significant. To quote Doc Brown, "No, no, no, no, no, this sucker's electrical." All the muscles need to move, is a jolt of electricity. No ATP/ADP or alien equivalent to make a chemical reaction that triggers movement. What you need to do, is figure out how the Raiken is producing the electricity from the food it eats, and not only that, but store it for later use like we do with chemical energy (fat). You don't need in-depth stuff - just the basics, which isn't here. Only the end result is.
The Digestive section needs a lot of work. Besides lacking the detail on how or why, it's too informal. First, you'll have to break off a different section, possibly even a different sub-artice, and define what they eat very clearly. Going off of the Raiken themselves, it'd be electropolymers and liquid hydrocarbons for an example. Only after you have clearly defined what they do eat, would you give any 'human equivalences', saying that the electropolymers they eat would be their version of meat, liquid hydrocarbons like concentrated sugar-water or something, while solid polymers would be starches. If its out of order, it gets confusing. And again, this ties into the last paragraph - how does their body convert it into what they need to power their bodies(electricity)? You can't say that they 'burn it' - it's too
If you don't understand why any of this is important, I'll give you one big reason; if you don't make this up, someone else will, and quite possibly, IC, at the head of a dissection table/lab. All for whatever reason they have. Maybe the person needs it for their plot. Maybe they want to spit in your eye. Whatever. Bottom line, it may not be to your liking in the slightest.