This fine picture was taken by my
client and shows very clearly spawning damage. This wound is infected with
aeromonas hydrofiller, which in turn infected the fish's internal organs and
hence it's demise. This is despite A1 spawning conditions in a well kept pond.
Spawning is linked to a sudden change in the waters condition e.g
temperature, with hot sun then sudden rain showers give very large temperature
Fish are spawning far more often this year, and this accounts for the
massive increase in fry in our lakes and rivers this year.
I have had more spawning damaged fish this year than any other to deal
All the damage seen here is
through spawning in a large pond in good condition
A small male came
unstuck when getting involved with larger males and real big ladies. The fish
ripped his anal fin and tore the base of the fin which lead to a infection of
aeromonas hydrofiller followed by sepsis.
Many young males suffer this
problem and it's very common in fishery lakes and medium sized planted ponds.
Koi very rarely spawn in show ponds, and this accounts for many egg
classic image of breeding tubercles on a male comet goldfish. These are often
their demise as they are treated as an infection to the point that many
chemicals are used, and the fish dies of