Appearance shapes which fish receive attention, while well chosen information can shift some perceptions. Recent experiments offer ideas for interpretation, with no demonstrated increase in real donations or animal welfare.
A smaller resource footprint starts with measurement and safeguards for water quality and biosecurity. The Institut Pasteur experience provides a way to test changes, not a universal water exchange target.
A live nauplius is not automatically a suitable meal. Hatcheries need to control the age, size, nutrient content and microbial load of Artemia all the way to the larval tank.
Downstream of a German wastewater treatment plant, resistance markers increased in water and sediment without a matching signal in the fish studied. Sample choice changed the answer.
Coral quarantine is more than a dip or a fixed number of days. It combines separated flows, repeated observation, stable water quality and a documented release decision.
Across 91 Flemish lowland river sites, eDNA produced ecological quality classes comparable to a conventional fish index. The result supports a hybrid approach, not immediate regulatory substitution.
Testing a few fish on fixed dates does not describe a facility’s health status. FELASA–AALAS recommendations connect daily surveillance, sampling, diagnosis and reporting to actual research risk.
Adding structures to a tank does not automatically improve welfare. Rainbow trout trials report behavioural and production benefits, but farms must protect water flow, cleaning and biosecurity.
This small freshwater cnidarian combines budding, regeneration, stem-cell lineages and whole-body imaging in a model that is simple in shape but not in biology.
Historic slag deposits on Marseille’s southern coast contain lead and arsenic. Assessing risk to fish requires tracking transfer pathways through to biological effects.
Preparing a ration does not prove that every fish ate. Useful monitoring connects preparation, individual access, refusals, body condition and effects on the exhibit.
A longer pathogen list is not automatically a stronger health plan. Risk-based surveillance connects hazards, transmission routes, consequences and each farm’s capacity to act.
