Open main menu
WikiProject Geography (Rated Start-class, High-importance)
This article is within the scope of WikiProject Geography, a collaborative effort to improve the coverage of geography on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
Start-Class article Start  This article has been rated as Start-Class on the project's quality scale.
 High  This article has been rated as High-importance on the project's importance scale.
WikiProject Geology (Rated Start-class, Mid-importance)
Reef is part of WikiProject Geology, an attempt at creating a standardized, informative, comprehensive and easy-to-use geology resource. If you would like to participate, you can choose to edit this article, or visit the project page for more information.
Start-Class article Start  This article has been rated as Start-Class on the project's quality scale.
 Mid  This article has been rated as Mid-importance on the project's importance scale.

Problem with definition?Edit

The definition of a reef is "[any] feature lying beneath the surface of the water yet shallow enough to be a hazard to ships." Further the article defines that "[seldomly] an artificial obstruction would be created that is a hazard to shipping" so that the term "artificial reef" is a "misnomer".

However such artificial and also quite flimsy constructions designed to obstruct shipping do exist and are quite common. For example, at the entrance of the Portsmouth harbour in the south of England two small submerged balls stand between forts and the coastline and deny passage of ships (only very small vessels can pass over them). I can't find an online reference to these walls but they are clearly marked on navigational maps of the area. The forts are: St Helens Fort, Spitbank Fort, Horse Sand Fort and No Mans Land Fort.

This is a map of the Solent that shows the forts and the walls (although not in great detail):

Actually I did find a reference to this submerged wall here: (search for "submerged barrier")
I found another reference here to a submerged wall build with the intention to obstruct shipping. Does this mean the definition of an "artificial reef" in the article is incorrect? Abstract follows:
"The Knights of St. John fortified Ramla l-Hamra against enemy intrusion. They constructed Vendome battery, which today is inconspicuous and in 1715, even went so far as to construct a submerged wall to deter marauding pirates from landing on the beach." (from

Definition of "articifial reef"Edit

The definition of "artificial reef" is this article does not match with the definition in the Artificial reef article which says it's a generic "man-made, underwater structure". The definition of the term belongs in that article and any criticism should be moved there.

External links modified (January 2018)Edit

Hello fellow Wikipedians,

I have just modified one external link on Reef. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

As of February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{sourcecheck}} (last update: 15 July 2018).

  • If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
  • If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—InternetArchiveBot (Report bug) 23:36, 21 January 2018 (UTC)

Reef Revolution (May 2018)Edit

Not sure if this fits with this article, as it's pretty much focused on reefs in general, and Reef Revolution is specfic to Coral Reefs. I think it should be moved to that article. User:Codesmith —Preceding undated comment added 18:49, 23 May 2018 (UTC)

Return to "Reef" page.