• ANKITA RAJESHIRKE
• UJWALA JADHAV

Red Tail Golden Asian Arowana (Scleropages formosus) is a magnificent tropical freshwater fish commonly found in Thailand, Malaysia, Myanmar, Indonesia etc., and is considered as world’s most expensive and demanding ornamental fish. Due to its prominent metallic golden shine, cycloid scales, elongated fins and undulating movements as it swims which is very much reminiscent to the Chinese lore ancient dragon, considered as an auspicious symbol giving rise to the belief that the fish brings good fortune, prosperity and success. Generally S. formosus are resistant to disease causing pathogens but occasionally they get infected by bacteria which lead to scale discoloration, loss of dorsal, caudal fin portions which causes fatal fin rot disease. Thus, in the current study chief virulent bacteria associated with fin erosion was isolated and identified from the Arowana maintained in laboratory conditions. The cause of the infection was attributed to the bacteria Enterobacter quasiroggenkampii, Pseudomonas guezennei that belongs to Enterobacteriaceae and Pseudomonas family i.e. cosmopolitan in nature and was responsible for mortality of majority different fish species. Accordingly, 16S rRNA gene sequencing, Antibiotic susceptibility test was done to identify the bacterial isolated from the infected fin of the fish. This is a pioneering study which reported Enterobacter quasiroggenkampii as a fish pathogen for the first time, a novel bacteria reclassified by Wu et al.2020 and also one of the chief causative agent for Red Tail Golden Asian Arowana fin rot disease. This study will also aid Arowana cultivators with the necessary information about fin rot disease and the ways for restricting or preventing the growth of virulent bacteria.

Scleropages formosus, Enterobacter quasiroggenkampi, Fin rot, Arowana, Pseudomonas guezennei

"ISOLATION, IDENTIFICATION OF NOVEL VIRULENT BACTERIA Enterobacter quasiroggenkampii AND Pseudomonas guezennei sp. ASSOCIATED WITH FIN ROT DISEASE IN RED TAIL GOLDEN ASIAN AROWANA (Scleropages formosus)", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 2, page no.c39-c45, February-2023, Available :http://www.jetir.org/papers/JETIR2302208.pdf

"ISOLATION, IDENTIFICATION OF NOVEL VIRULENT BACTERIA Enterobacter quasiroggenkampii AND Pseudomonas guezennei sp. ASSOCIATED WITH FIN ROT DISEASE IN RED TAIL GOLDEN ASIAN AROWANA (Scleropages formosus)", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 2, page no. ppc39-c45, February-2023, Available at : http://www.jetir.org/papers/JETIR2302208.pdf