Goldfish varieties to keep in your biorb I

This is the start of a series of blogs on goldfish varieties to keep in your biorb.

This week it's what goldfish varieties NOT to put in your biorb... :)

In general it's best to keep to the fancy goldfishes with good constitution or good hardiness. Also, regardless of how hardy, the fast swimming goldfish such as common goldfishes and the sarasa comets are better kept outside in ponds where they have a lot of room to grow and swim around. They can grow to over a foot long in a pond and are most likely to rapidly outgrow a biorb's limited space very quickly.

A common goldfish with Red colouration


A Sarasa Comet

Plus the biorb has too small a space for these fast swimming fish to move in. It would be cruel to keep them in there.

Other fishes which are not advised are obviously the expensive and rare goldfishes. Especially the tosakins, jikins, even the ranchus... and of course the bubble-eyes due to the tube that Biorbs have sticking up in the middle.

A Tosakin - best viewed from above - has a lovely joined-up tail, and some difficulty swimming and breeding

A Jikin - also known as a peacock tail

A Bubble-eye goldfish - this photo courtesy of Bristol Aquarists

An extremely cute ranchu - this photo also courtesy of Bristol Aquarists
Technically small ranchus could be kept in the biorb, but since it has a head growth the water must be kept clean otherwise there's a risk of bacterial infection.