An outbreak of Cryptocaryon irritans ( Ci ) occurred during the quarantine of marine teleost fish at a large aquarium facility, leading to 457 mortalities across 16 species. This study investigates the outbreak through a retrospective analysis of clinical and pathological findings, emphasising the role of detailed pathology in outbreak characterisation. Lesion diversity, host‐specific susceptibility and mortality rates were ex...

Elasmobranchs (sharks and rays) are charismatic cartilaginous fish, popular in public aquaria. Almost 200 shark and ray species are listed as threatened by the International Union for Conservation of Nature (IUCN), demonstrating the importance of captive breeding and research programmes. Limited studies investigate diseases of elasmobranchs in captive and free‐living environments, and among available literature neoplasia is ra...

Syngnathidae (seahorses, pipefish and seadragons) are charismatic species commonly kept in commercial aquaria, but published literature on syngnathid diseases is limited and immunohistochemical techniques not routinely employed. A retrospective review of 2,541 syngnathid submissions received between March 2003 and October 2016 identified 18 neoplasms including germ cell tumours, exocrine pancreatic and intestinal carcinomas, c...