Xenopus tropicalis is a diploid model for studying gene function. CRISPR experiments need functional validation alongside documented husbandry conditions.
The nematode Anguillicola crassus damages European eel swim bladders. Monitoring should separate parasite presence, burden and cumulative lesions over time.
Targets, stations and positive reinforcement can reduce some captures. A useful programme defines behaviour, measures outcomes and respects refusal each time.
In Daphnia magna, clone identity, diet and medium shape test validity. OECD criteria are a minimum requirement, rather than proof of comparability alone.
Infectious salmon anaemia requires combined diagnostics and immediate biosecurity. A molecular result alone cannot describe disease or clinical severity.
Lymphocystis nodules in aquarium fish look dramatic but often resolve. Confirming the diagnosis prevents unnecessary treatment and harmful repeated handling.
Amoebic gill disease (AGD) in salmon develops before performance falls. Combining gill scores, respiratory monitoring and PCR supports decisions without overinterpreting one test.
Amyloodinium may cause rapid respiratory distress without visible velvet. Early detection depends on gill assessment, context and functional quarantine.
