Affected trout choose warmer water and resume feeding. The finding may help target care, but thermal enrichment remains experimental on commercial farms.
In six Ozark streams, intermittence altered fish functional organization without reducing richness. The signal is informative but geographically local.
A motile ciliate on a marine fish is not a diagnosis. Lesions, tissue invasion, molecular identity and the tank’s case history must converge carefully.
In France, research fish may be rehomed under strict conditions. Health, biosecurity, recipient capability and follow-up need planning before a study ends.
Hikui describes skin lesions seen mainly on red areas of koi carp. Clinical appearance can guide sampling, but histology is needed to characterise the tumour.
Four pharmaceuticals altered several biomarkers in experimentally exposed carp. These early biological signals are not yet a field diagnosis of ecological risk.
Viral haemorrhagic septicaemia calls for early sampling, laboratory confirmation, lot traceability and proportionate action under the applicable rules.
European requirements set boundaries for zebrafish water, density and lighting. Daily control depends on trends, defined alerts and traceable corrective action.
Health monitoring in aquatic research facilities links objectives, epidemiological units, observations, samples and decisions instead of accumulating disconnected tests.
Benedenia and Neobenedenia can persist in public aquariums when attached eggs escape treatment. Diagnosis, life-cycle timing and system management must work together.
