From The Aquarium Wiki
When you visit the Aquarium Wiki Encyclopaedia your computer's IP address, type of web browser and time of access is logged.
However no other data is recorded and any edits you do are effectively anonymous.
If you decide to create an account with us then this data is retained in a database only for access by yourself and to maintain the various pages you edit.
The database is maintained by the owner of the site - Brian Malinconico and he doesn't intend to sell or give away any of your details to a 3rd party.
The Wiki site does place a Cookie on your PC. But this is only for allowing quick and easy entry to the site when you revisit so you don't have to re-enter your user name and password. You can delete this Cookie from your computer at any time.
If you wish to delete your account, then email Brian - Special:Emailuser/PsiPro