These are dark shadows inside the fish with no swellings,
They are tapeworms. It is possible to trace to length of it inside the fish as the worm is being expelled using Rife frequencies,
Parasite Tapeworms 164 Hz
Parasite Tapeworms 187 Hz
Parasite Tapeworms 453 Hz
Parasite Tapeworms 523 Hz
Parasite Tapeworms 542 Hz
Parasite Tapeworms 623 Hz
Parasite Tapeworms 803 Hz
Parasite Tapeworms 843 Hz
Parasite Tapeworms 854 Hz
Parasite Tapeworms 1223 Hz
Parasite Tapeworms 1360 Hz
Parasite Tapeworms 3032 Hz
Parasite Tapeworms 5522 Hz
When the eggs hatch, there should be another application of these frequencies. Use a higher frequency paired with a lower frequency for at least half an hour (eg. 164 with 1360 Hz).