ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel
  • »
  • Pets and Animals»
  • Tropical Fish & Aquariums»
  • Freshwater Aquarium Animals»
  • Cichlids

Pseudotropheus demasoni

Updated on July 5, 2011
Photograph by Magnus Manske
Photograph by Magnus Manske

Pseudotropheus demasoni are one of the most beautiful aquarium fish you will find. They are relatively new to aquarium hobbyists having only been described by the legendary Ad Konings in 1994. Since that time they have become popular amongst hobbyists due to their intense color and entertaining behavior. They are a dwarf species endemic to Lake Malawi.

Pseudotropheus demasoni basics

Size: Dwarf - The biggest male I've seen was under 4 inches (about 9cm), females will be smaller

Water Ph: 7.5 - 8.6 (I keep mine at Ph=8.0)

Aggression: High. What these little guys lack in size they make up for with attitude. I have seen one of my 3 inch males chase off an aggressive 8 inch melanochromis baliodigma (the dominant fish in a community display tank) many times. I have lots of stories of the dominant male Pseudotropheus demasoni chasing others until exhaustion (and subsequent death). I keep mine in a community tank with other African cichlids where the Demasonis are the smallest species and I have never had any major problems. Although its worth noting that its a 6 foot tank with plenty of rocky hiding places.

Male - Female ratio: There are two schools of thought for male-female ration when keeping Demasonis in an aquarium. In the wild they are found in very large schools. It makes sense then to keep a school of 10 or 12 in your tank. With such a large number the male to female ratio will be less important as its unlikely any non-dominant males or females will be individually be singled out and harassed to the point of exhaustion. Instead, the chasing will be spread across the school. On the other hand a smaller school with only one male may also work, whereby there is no non-dominant males being harassed and there is enough females to prevent any one individual being targeted. If you try the latter, be willing to accept the occasional casualty. However, my dominant male is more curious than aggressive and has never been the cause of any problem... hopefully this will be true for you also!

Healthy example of Pseudotropheus Demasoni

Breeding Pseudotropheus Demasoni

Breeding Demasoni cichlids is relatively easy. The male will be constantly trying to court the female. When the female is ready to accept they will do a slow circle dance whereby the female will lay the egg, scoop it up in her mouth. The male will thenĀ fertilizeĀ the egg. The female will hold the eggs in her mouth until the fry develop and become free swimming (usually about 3 weeks). I've attached a video of the spawning process. In this video you can see this whole process occur.


    0 of 8192 characters used
    Post Comment

    No comments yet.


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: ""

    Show Details
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)