What time of year do goldfish have breeding tubercles?

fec0a1fe-7113-44d6-a7fd-319a83e18c01

Editor's Picks
 A perfect place for your Fighter to rest his little fins — the Betta Bed Leaf Hammock.
Gear Post
Review: Betta Bed Leaf Hammock
21 November 2017
 Just look at that little face... No wonder then, that so many fishkeepers find these little puffers so hard to resist.
Features Post
Join the puffer fish fan club!
28 September 2017
 Special care needs to be taken when catching Pictus catfish and other species with spines.
Features Post
Travels with your fish
03 August 2017

When should you look for signs that the goldfish breeding season is under way? Paul Green advises.

Goldfish will normally sport full tubercles during the breeding season which can run from spring through to autumn.

However, because we are able to easily regulate the temperature of the goldfish in our care we can actually maintain them in breeding condition throughout the year. I have spoken to breeders who purposely hold their fish at around 18°C/64°F year-round just in case they want to have a spawning!

I’ve never tried this and prefer to follow seasonal changes which in my opinion gives the fish more vigour come the spawning season.

Female goldfish can have the odd tubercle by the way, so this shouldn’t always be taken as a guaranteed sexing method.

This article was first published in the November 2009 issue of Practical Fishkeeping magazine. It may not be reproduced without written permission.