Fish Health - Spawning

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 movement

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 with.

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 bound fish.

A 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 toxemia.