SCP Foundation

the natural habitat of the American Alligator in Containment Site ██.

Although you use the scientific name latter in the doc, you should really use it the first time you mention the organism, which is here in the containment procedures. The Latin name should also be in italics.

Object is fed bird, fish, and frog meat daily.

This is very vague. How much food should it be fed and how many times a day?

weighing 900 pounds, and measuring 14 feet long

Don't use imperial measurements in a scientific document. Instead, use the SI unit, which is metric. So it should be kilograms and meters.

SCP-XXXX can vanish for approximately .24 of a second,

"Can" doesn't really sound right here, maybe "will" or just get rid of can and make it "vanishes".

reappearing as 2-Dimensional upon the surface.

Couple things here. Instead of using the numeral, you should just write it up as "two-dimensional". It also feels like you're missing a word here, feels like the word "organism" or something should go after "two-dimensional".

The method as to how SCP-XXXX can achieve such a feat is currently unknown.

"Achieve such a feat" feels very nonclinical, I'd replace this with something else.

When in a 2-D state

I'd just say "two-dimensional" instead of "2-D" for the rest of the article.

Occasionally after SCP-XXXX transforms into 2-Dimensions, spacial wormholes appear on the ground where SCP-XXXX had been before its transformation and disappear after roughly 20 minutes, known as SCP-X-1.

The way this is set up, it sounds like the time period of 20 minutes is SCP-X-1. I'd set it up like this instead:

Occasionally after SCP-XXXX changes form, spacial wormholes manifest on the floor (referred to as SCP-X-1) where SCP-XXXX had been before its transformation

That was quick and it still feels nonclinical to me, but it's just an example.

Contact with D-7391 and D-8735 ceases, with D-7391 and D-8735 being deemed lost.

Who is D-7391?? Did you mean D-2491?

Overall, I'm just kind of feeling meh. You have a giant alligator that can "Link Between Worlds" on walls and makes "wormholes" (not sure if a scientific document would call them that) to a weird dimension. And that's really all there is too it. There's not much here at the moment that would make me upvote, and it'snot very interesting.

Instead of just trying to focus on an anomaly, think of a story you would want to tell and build off of that instead of the anomaly. Most modern SCPs are structured like that; if they don't tell a story, they usually have an interesting backstory for the SCP.

There are also a liot of clinical tone issues. I'd read the section in How to Write an SCP about tone and then move on to Clinical Tone Declassified. If you need more help, I'd come to the IRC chat and #thecritters channel.