There is no cause for alarm, particularly if the spots:
- arise only during spring;
- they are localised to the gill covers and the leading edge of the pectoral fins;
- they are only on the male fish;
- the fish with such spots do not show signs of ill-health.
If unsure, consult your fish veterinarian as it could be confused with serious diseases such as white spot disease, lymphocystis and velvet disease for example.
