Gardens Dizzy fish
the start of last winter, I noticed that some of my fish seemed
to lose their balance - they either lay listlessly at the surface
or did flip flops in the water. What causes this?
is a swim bladder disorder and can be caused by a number of things.
The most likely cause is cooling temperatures and the best thing
to do is nothing. It will almost certainly cure itself in a few
Other causes are constipation,
genetic disorders, physical damage and, in rare cases, bacterial
infections of the gut. Whatever the original cause, the swim bladder,
which is a small organ filled with gas that fish use to maintain
their balance in the water, is pressured and damaged. It is also
quite common in spring and is rarely fatal, although your fish will
look funny swimming at angles for a while.
Gardener, Issue 86, 2001, Page 22
Reproduced with permission from the former Weekend Gardener magazine. The views expressed here are not necessarily those of the RNZIH.