Mortality and Treatment of Electric Blue Jack Dempsey (Rocio octofasciata) and Blood Red Parrot Cichlid Fish in Planarian Infestation

Önalan Ş., Sepil A.

Hydrobiological Research, vol.2, no.1, pp.7-11, 2024 (Peer-Reviewed Journal)

  • Publication Type: Article / Article
  • Volume: 2 Issue: 1
  • Publication Date: 2024
  • Doi Number: 10.5281/zenodo.10553348
  • Journal Name: Hydrobiological Research
  • Journal Indexes: Other Indexes
  • Page Numbers: pp.7-11
  • Van Yüzüncü Yıl University Affiliated: Yes


Aquarium fisheries is an important sector in aquaculture, which is carried out for economic and hobby purposes. 

Diseases, particularly parasitic infestations, represent a significant economic challenge in this sector. Parasitic infestations 

have an important place in aquarium fish. Planarians are flatworms that can live in both freshwater and marine waters, 

appearing in many shapes and forms. In this study, mortality and treatment due to Planaria infestation in electric blue Jack 

Dempsey (Rocio octofasciata) and blood red parrot cichlid fish were investigated. In a freshwater aquarium with a 400 liter 

capacity, housing of 13 fish with an average length of 12 ± 0.1 cm and a weight of 50 ± 1 g, the infestation of Planaria 

occured due to overfeeding and equipment contamination, resulting in a mortality rate of 60%. For the treatment of 

morphologically identified Planaria species, it was observed that the mortality was reduced and the development of the 

parasite stopped with the use of 3 mL/100 L FMC (Formalin-Methylene-Malachite) suspension. As a result of the study, it 

was seen that the water temperature was increased to 31oC after removing the infested fish from the aquarium in Planaria 

infestation and disinfection of contaminated tools and equipment after FMC (3.7 g / 3.7 g / L) application could get rid of 

the infestation.