Anyone know what this is?

[Mehmet91]

Hi there I have two fancy goldfish brought from online store around 2/3 months quarantined for a few weeks before placing in main 300L tank

Both fish eating well however one of them I have noticed a hard white thing at back of one of them the picture is below

when these fish where ordered they was classed as “Fancy” goldfish but am I right in saying these are orandas bubble head wen type?

the bigger fish has little pimple spots that I had thought was whitespot/ich but is this growth spots ?


the bigger goldfish does tend to always chase the little one sometimes too much, I’m trying to observe to see if he is nibbling at the white part on the other fish, is this a cause for concern? Does anyone know what this is?

In terms of water parameters everything is stable and well established no water issues

10ppm nitrate
0ppm nitrite
0ppm ammonia
0ppm chlorine
8.2 ph
22c temp stable

Many thanks

 

[V1K]

I think those spots are breeding tubercles, the indication that this is a boy who's ready to spawn. That would explain him chasing the other fish. Spawning chasing can look intense, but normally doesn't cause trouble as long as both fish are healthy and have enough space, and there are no sharp objects they might injure themselves with in a frenzy.