absolutely - add whatever fish you can to the wiki
First you need to register, so you need to click the link at the top right where is says
If you want to make a new user, just type in a username (In the format UserName if at all possible), a valid email address & your real name (If you want), leave the password field blank and click the "Create new account" button.
From there, if you want to create a new page, all you need to do is go to the Front Page, click the link I've created to the new page creator, and follow the instructions there. It's all very simple really, once you get your head around it. If you go to edit a page, you'll notice some buttons at the top. If you hover over those, they'll pop-up with what they do