Jump to content

Search the Community

Showing results for tags 'tubercles'.

The search index is currently processing. Current results may not be complete.
  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


  • Welcome Start Here!
    • Announcements/ Comments or Suggestions
  • General Goldfish Area
    • New to the hobby or new to Kokos.
    • Classifieds and Reviews
    • Goldfish Discussion
    • Goldfish Food
    • Equipment and Water Care
    • Goldfish and Ponds.
    • Goldfish & Plants.
    • Types of Goldfish
    • DIY and Tips
    • Goldfish Breeding
    • Sick Fish? Need Help?
    • Treatments
    • Quarantine/ New fish arrival.
  • Photo Area
    • Goldfish Photos / Videos
    • Tank Photos
    • Koi and Goldfish Shows. (photos and videos)
  • Misc.
    • Off Topic Chat
    • Goldfish Art
    • Goldfish Blogs
    • When things go wrong! / Obituaries.
    • Fish in the News
    • Polls
  • Koko's Kritters
    • Koko's Kritters General
    • Tropical and Betta Fish Section
    • Marine fish
    • Snails and Crustaceans
  • Subscriber's Forums
    • Goldfish Discussion


  • Frequently Asked Goldfish Questions
  • Aquatic Equipment
  • Aquatic Plants
  • Disease Information
  • DIY Projects
  • Goldfish Food
  • Goldfish Keeping Tips
  • Research Articles
  • Reviews
    • Book Reviews
    • Product Reviews
  • Water Quality Articles
  • Betta Care
  • Contest Photos
    • Goldfish Photo Of The Week


  • koko's Goldfish Blog
  • Living Works of art.
  • Chrissy's Fishies
  • Made in England
  • The Tale of the 55
  • Koko's Cats
  • Jumpin in with Both Feet
  • Clockwork Little Happiness
  • Oerba Yun Fang's Blog
  • Get Thee to a Fishery
  • 45 gallons of FUN! :)
  • happysnapper's Blog
  • Tithra's Water Puppies Blog
  • Narny105's Blog
  • Mike's corner
  • A Sizeable Undertanking
  • ninzah's Blog
  • Harry high pants' Blog
  • Distasty's Blog
  • Quasi's Blog
  • eddie1973's Blog
  • Sharkbait3's Blog
  • Quasi's Blog
  • MissColonel's Blog
  • MissColonel's Blog
  • The Flora and Fauna of Jenny
  • New fish!
  • Kokos Microscope Blog
  • Lovely Chaos
  • A Wild Magikarp Appeared!
  • Scaled to Fit
  • Hidden Valley Ranchu: The Reboot
  • Weigh in
  • sarajo's Blog
  • RanchuDressing's Blog
  • Out Of Water - Chelsea M's Blog.
  • Big and Little Scaled Friends
  • The Unablogger
  • Mermaid Kitten's Pisces Dream
  • mermaidkitten's Blog
  • One fish, Two fish, lots of Goldfish
  • jfg5018's Blog
  • Underwater Allie
  • Mysterygirl's Floating-World
  • GoldfishGirl82's World of Fish
  • The Universal Water Pigs
  • Speckles' Blog
  • alexloo11's Blog
  • The five babies
  • TikiLola's Candy Shoppe
  • mjfromga's Blog
  • test

Product Groups

There are no results to display.

Find results in...

Find results that contain...

Date Created

  • Start


Last Updated

  • Start


Filter by number of...


  • Start



Website URL



Goldfish Blog


Referred By

How many Goldfish


Found 2 results

  1. I'm pretty sure these are harmless spots but thought I'd double check here. I noticed my black moor had spots on his gill covers a couple of weeks ago & now has them along the front edge of each front fin. The spots are nowhere else on the body. I'm thinking they are breeding tubercles & I have a male moor. would I be right? (sorry the photos are a bit crap, it's difficult to get him to stay still!)
  2. Goldfish Breeding Tubercles What are they and what are they for? J. M. Connelly 2012 Breeding tubercles are keratin-based skin nodules found on male goldfish. They most often occur on the leading rays of the pectoral fins and the opercula (gill covers), but they can also be found on all rays of the pectoral fins, on the head and around the eyes, on the leading rays of the pelvic fins, and even on the body of the fish (not to be confused with the parasite Ichthyophthirius multifiliis). When breeding tubercles occur on the body of the fish, they are arranged on the scales in a neat pattern matching the contour of the scales. In contrast, the ich parasite occurs randomly all over the body. Breeding tubercles are induced, in part, by testosterone, and there is great variation in their appearance. There may be just a few tubercles on the pectoral fins, many tubercles all over the fish, or anything in-between. This red broadtail has many tubercles all over the rays of his pectoral fin, all over his operculum, and all over his face. This black butterfly telescope has many tubercles on the leading ray of his pectoral fin and some tubercles on his operculum. This red veiltail telescope has tubercles above his eye, on the leading ray of his pectoral fin, and on his operculum. This calico butterfly telescope has tubercles on his operculum and on the leading ray of his pectoral fin. This image illustrates the difference between breeding tubercles on the body and the ich parasite on the body. There is no clear consensus as to what the breeding tubercles are used for, but there are many possibilities. They may be used for male/female differentiation, protection against injury, weapons in intense pre-spawning male behavior, as a means to stay close to their mate during spawning, stimulators during spawning, an indicator of male health, or an indicator of male dominance. The actual purpose of breeding tubercles could be some, or all, of the above things. In a study by Kortet et al, it was found that the breeding tubercles of the Roach (a fish related to the goldfish) serve as a status badge, with more dominant males possessing more tubercles than less dominant males. They also found that the tubercles serve as an indicator of male quality, meaning that males with more tubercles have greater reproductive success and are healthier (have fewer parasites). This means that the breeding tubercles serve as a marker to help the female fish pick mates that are healthier and have a better chance at fertilizing their eggs during a spawn. Work Cited: Kortet R., J. Taskinen, A. Vainikka, and H. Ylonen. 2004. Breeding Tubercles, Papillomatosis and Dominance Behavior of Male Roach (Rutilus rutilus) During the Spawning Period. Ethology 110:591-601. This post has been promoted to an article
  • Create New...