http://thegoldfishtank.com/goldfish-care/breeding/how-do-goldfish-mate/

Jul 26, 2015 ... Successfully breeding your goldfish confirms that you've taken good ... Once you know what the signs are you will have no problems spotting it!

https://www.fishkeepingworld.com/how-do-fish-mate/

Jun 26, 2018 ... Breeding Betta Fish; Breeding Goldfish. Five Things .... A sign that they are ready to start mating is when they begin to establish bubble nests.

https://fullserviceaquatics.com/koi-pond/koi-and-goldfish-spawning-in-your-backyard-pond/

Aug 13, 2014 ... Koi and goldfish spawning season sneaks up on pond owners. ... so you can witness a koi spawning, there are some easy to recognize signs ...

https://puregoldfish.com/pregnant/

Sep 21, 2018 ... Want to learn how to tell if your goldfish is pregnant? You've ... It just means there is a possibility your fish have gone into spawning season.

https://www.youtube.com/watch?v=Z3Qv9Bt52w0

May 21, 2018 ... Had the opportunity to witness some goldfish / comet spawning in my pond recently, so I figured I'd record it and share some information about ...

https://animals.mom.me/long-goldfish-mate-lay-eggs-10454.html

Goldfish get interested in spawning when cold water begins to warm up a little. Gradually increasing the temperature of the water from the 50 degree range up to  ...

https://www.wikihow.com/Breed-Goldfish

For a female goldfish, look for ones with large rear and ... their heads on their gills is a sign of an ideal mate.

https://howtotakecareofgoldfish.com/goldfish-breeding-what-you-need-to-know/

#2 Sexing your goldfish. When mature, goldfish can be sexed fairly easily. (How to tell if the fish is male or female). Mature males develop breeding tubercles on ...

https://www.wikihow.com/Tell-if-a-Goldfish-Is-Pregnant

When your male goldfish are ready to spawn, they will develop tiny white bumps known as “spawning ...

https://www.cuteness.com/article/tell-goldfish-ready-lay-eggs

Observe the goldfish during May and June for the first signs of spawning behavior and physical changes. Male goldfish will develop raised, white colored  ...