ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

Why Does My Fish Have Velvet?

Updated on March 9, 2014

Like the white spot disease, the velvet disease is caused by a protozoan. It is remarkable the similarities among the two organisms considering that they don't have a direct relationship (Velvet is a flagellate parasite whereas White Spot is a ciliate).

Both biological cycles have an infecting phase (state of growth) and a free phase (state of multiplication). The first symptoms are also similar. In advanced state the velvet disease is contagious and fatal.

The agent of the velvet disease is a protozoan of the Oodinium species, has a round oval shape or pear shaped. Through a kind of roots it adheres to the skin of the fish and feeds of alive organic matter.

The parasite secret enzymes that can partially dissolve tissues, appearing small nodules of whitish color (which makes this disease to be mistaken in its initial phase with the white spot disease).

Velvet Causes
Velvet Causes

The parasitosis begins in the gills, subsequently spread throughout the body of the fish.

The fish's immune system reacts against the parasite secreting mucus. The skin of the fish becomes opaque giving the velvet aspect that gives name to the disease.

The parasite completes the infecting phase feeding on the host fish, until it reaches maturity. At this time the parasite leave the fish and falls to the bottom of the aquarium to start the reproductive stage.

When leaving the fish, the parasite segregates a cellulose shell as protection. Inside the shell multiple divisions are produced.

4 stars for Tropical Fishlopaedia

Identify and Treat Health Problems such as White Spot, Velvet and Fin Rot in your tropical fish, saving on vet bills and headaches.

It can produce up to 256 flagellated spores (dinospores) that break the shell and swim until they find a new host fish to parasitize.

If the new parasites don't find a fish in a term from 24 at 36 hours, the dinospores dies. The life cycle is completed in ten to fourteen days at a temperature of 23 to 25 degrees.

The white spot disease and the velvet disease have similar symptoms, and the first manifestations on the body of the fish are also similar. Although the parasites are very different, both have a similar life cycle as well.

The difference between them lies in the consequences on the fish and the degree of aggressiveness. The velvet disease is much more devastating, and can eliminate the entire population of an aquarium.

To know how to detect it on time and how to treat it is essential to save the life of the fish.


Submit a 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)