Scientific, veterinary and regulatory updates for aquatic-animal professionals.https://www.vetofish.com/enhttps://www.vetofish.com/en/news/indicateurs-bien-etre-bar-europeen/https://www.vetofish.com/en/news/indicateurs-bien-etre-bar-europeen/For sea-caged European seabass, useful welfare monitoring combines mortality, health, behaviour and water quality without mistaking consensus for validation.Sun, 02 Aug 2026 00:00:00 GMTAquacultureEuropean seabassfish welfareoperational welfare indicatorssea cageswater qualityfeeding behaviourhttps://www.vetofish.com/en/news/gephyrine-myelination-axones-poisson-zebre/https://www.vetofish.com/en/news/gephyrine-myelination-axones-poisson-zebre/In larval zebrafish, oligodendrocytes use a protein best known from inhibitory synapses to influence axon-class targeting and restrain myelin sheath length.Wed, 29 Jul 2026 00:00:00 GMTResearch facilitieszebrafishmyelinoligodendrocytesgephyrinGABAergic axonsconfocal imaginghttps://www.vetofish.com/en/news/requins-taureaux-commerce-aquariums-tracabilite/https://www.vetofish.com/en/news/requins-taureaux-commerce-aquariums-tracabilite/A review documents rising sand tiger shark collections in Delaware Bay and calls for population assessment, lifelong traceability and demonstrable conservation returns for every permit.Tue, 28 Jul 2026 00:00:00 GMTPublic aquariumssand tiger sharkpublic aquariumsinternational tradeDelaware Bayanimal traceabilityshark conservationhttps://www.vetofish.com/en/news/anguilles-argentees-loire-predation-barrage/https://www.vetofish.com/en/news/anguilles-argentees-loire-predation-barrage/Acoustic tracking of 80 silver eels in the Loire basin found little predation, but all four sensor activations followed passage of the Châtellerault dam.Mon, 27 Jul 2026 00:00:00 GMTEnvironmentEuropean eelsilver eel migrationEuropean catfishLoire basinacoustic telemetryhydropower barriershttps://www.vetofish.com/en/news/densite-poissons-macrophytes-etangs-dombes/https://www.vetofish.com/en/news/densite-poissons-macrophytes-etangs-dombes/Across 38 French and Belgian fishponds, higher fish densities were associated with lower macrophyte richness, informing production–biodiversity trade-offs.Mon, 27 Jul 2026 00:00:00 GMTEnvironmentFrench fishpondscommon carpaquatic macrophytesfish stocking densityfreshwater biodiversityextensive pond farminghttps://www.vetofish.com/en/news/ratio-epa-dha-alevins-saumon-alphavirus/https://www.vetofish.com/en/news/ratio-epa-dha-alevins-saumon-alphavirus/Atlantic salmon fry given equal total EPA and DHA in three different proportions showed distinct growth and disease outcomes after a salmonid alphavirus challenge.Mon, 27 Jul 2026 00:00:00 GMTAquacultureAtlantic salmonEPA and DHAfirst-feeding frysalmonid alphavirusaquafeed formulationfish healthhttps://www.vetofish.com/en/news/adn-environnemental-poissons-guyane-bibliotheque-12s/https://www.vetofish.com/en/news/adn-environnemental-poissons-guyane-bibliotheque-12s/A new 12S reference library covers almost 89% of French Guiana’s freshwater fish fauna, strengthening species identification in environmental DNA surveys.Sun, 26 Jul 2026 00:00:00 GMTEnvironmentenvironmental DNA12S metabarcodingFrench Guiana fishreference libraryaquatic biodiversityecological monitoringhttps://www.vetofish.com/en/news/fronts-oceaniques-barrieres-pecheries/https://www.vetofish.com/en/news/fronts-oceaniques-barrieres-pecheries/A global analysis shows that thermal fronts often separate fishing activity between warm and cold waters, an effect obscured when fronts are treated only as aggregation zones.Sun, 26 Jul 2026 00:00:00 GMTEnvironmentocean frontsfish distributionfishing activitysea-surface temperaturethermal habitatspatial managementhttps://www.vetofish.com/en/news/sema4ab-regeneration-moelle-poisson-zebre/https://www.vetofish.com/en/news/sema4ab-regeneration-moelle-poisson-zebre/After spinal cord injury, disrupting sema4ab doubles progenitor and neuron production in zebrafish but reduces axon regrowth and swimming recovery.Sat, 25 Jul 2026 00:00:00 GMTResearch facilitieszebrafishspinal cord injurymicrogliaregenerative neurogenesisSema4ablocomotor recoveryhttps://www.vetofish.com/en/news/biodiversite-vegetale-guppys-bien-etre/https://www.vetofish.com/en/news/biodiversite-vegetale-guppys-bien-etre/Guppies housed with plants showed favourable behavioural indicators, while lower basal cortisol occurred only in the treatment containing three plant species.Fri, 24 Jul 2026 00:00:00 GMTPublic aquariumsguppy welfareplant diversityaquarium enrichmentbasal cortisolhabitat designpublic aquarium husbandryhttps://www.vetofish.com/en/news/enrichissement-tactile-dorade-stress/https://www.vetofish.com/en/news/enrichissement-tactile-dorade-stress/A 21-day trial linked voluntary passage through soft strands with fewer aggressive displays and a reduced acute stress response in gilthead seabream.Thu, 23 Jul 2026 00:00:00 GMTAquaculturegilthead seabreamtactile enrichmentfish welfarestress responsecortisolaggressive behaviourhttps://www.vetofish.com/en/news/turbines-hydrocinetiques-comportement-truites/https://www.vetofish.com/en/news/turbines-hydrocinetiques-comportement-truites/In a laboratory flume, juvenile trout passed small hydrokinetic turbines while adjusting their swimming behaviour to the wake and social setting.Thu, 23 Jul 2026 00:00:00 GMTEnvironmenthydrokinetic turbinesjuvenile rainbow troutfish passageshoaling behaviourturbine wakeenvironmental assessmenthttps://www.vetofish.com/en/news/rechauffement-biomasse-poissons-limites-thermiques/https://www.vetofish.com/en/news/rechauffement-biomasse-poissons-limites-thermiques/An analysis of 33,990 populations separates the erosion linked to long-term warming from rapid shifts during warm years and marine heatwaves.Wed, 22 Jul 2026 00:00:00 GMTEnvironmentocean warmingfish biomassmarine heatwavesthermal range edgesfisheries managementecological monitoringhttps://www.vetofish.com/en/news/solvants-tests-comportementaux-larves-poisson-zebre/https://www.vetofish.com/en/news/solvants-tests-comportementaux-larves-poisson-zebre/A seven-solvent study shows that the vehicle can alter zebrafish larval locomotion and confound behavioural results unless controls are carefully designed.Tue, 21 Jul 2026 00:00:00 GMTResearch facilitiesorganic solventszebrafish larvaelocomotor activityvehicle controlslight-dark assayexperimental reproducibilityhttps://www.vetofish.com/en/news/microbiome-eau-aquariums-surveillance-dysbiose/https://www.vetofish.com/en/news/microbiome-eau-aquariums-surveillance-dysbiose/A longitudinal survey of six freshwater exhibits shows how water microbiome profiles may complement health surveillance without replacing clinical assessment or targeted diagnostics.Mon, 20 Jul 2026 00:00:00 GMTPublic aquariumsaquarium water microbiomeaquatic health surveillance16S sequencingmicrobial dysbiosisopportunistic bacteriaexhibit maintenancehttps://www.vetofish.com/en/news/desinfection-oeufs-salmonides-risques-viraux/https://www.vetofish.com/en/news/desinfection-oeufs-salmonides-risques-viraux/Iodophor treatment reduces viral contamination on salmonid egg surfaces, but it must remain part of a documented, multi-barrier hatchery biosecurity plan.Sun, 19 Jul 2026 00:00:00 GMTAquaculturesalmonid eggsiodophor disinfectionhatchery biosecurityviral haemorrhagic septicaemiainfectious haematopoietic necrosisbatch traceabilityhttps://www.vetofish.com/en/news/chytrides-amphibiens-catalogne-temperature-pressions-humaines/https://www.vetofish.com/en/news/chytrides-amphibiens-catalogne-temperature-pressions-humaines/A survey of 3,253 wild amphibians links Batrachochytrium dendrobatidis detection with temperature and human disturbance, without establishing causation.Sat, 18 Jul 2026 00:00:00 GMTEnvironmentamphibian chytridiomycosisBatrachochytrium dendrobatidiswildlife disease surveillancemidwife toad tadpoleshuman disturbanceMediterranean amphibianshttps://www.vetofish.com/en/news/cryptocaryon-hydroxychloroquine-quarantaine-aquarium/https://www.vetofish.com/en/news/cryptocaryon-hydroxychloroquine-quarantaine-aquarium/A 2025 case report describes rapid clinical improvement in nine marine fish after hydroxychloroquine exposure. Its uncontrolled design makes it a prompt for stronger diagnostics, quarantine and drug monitoring—not a dose to copy.Sat, 18 Jul 2026 00:00:00 GMTPublic aquariumsCryptocaryon irritansmarine fish quarantineaquarium therapeuticswet-mount diagnosiscollection biosecurityhttps://www.vetofish.com/en/news/danionella-comportement-collectif-thyroide-atpase/https://www.vetofish.com/en/news/danionella-comportement-collectif-thyroide-atpase/Whole-brain RNA sequencing, CRISPR perturbations and T3 exposure identify a thyroid–klf9–ATPase pathway associated with aggregation and alignment in Danionella cerebrum.Sat, 18 Jul 2026 00:00:00 GMTResearch facilitiesDanionella cerebrumschooling behaviourthyroid signallingwhole-brain RNA sequencingCRISPR screeningsocial neurobiologyhttps://www.vetofish.com/en/news/peche-electrique-lesions-vertebrales-salmonides/https://www.vetofish.com/en/news/peche-electrique-lesions-vertebrales-salmonides/A field study in Idaho found frequent, externally hidden spinal injuries in salmonids and measured pulse multiplication when three unsynchronised backpack electrofishers worked in overlapping fields.Sat, 18 Jul 2026 00:00:00 GMTEnvironmentscientific electrofishingspinal injuryRainbow TroutMountain Whitefishoverlapping electrical fieldsriver fish monitoringhttps://www.vetofish.com/en/news/vaccin-oral-nodavirus-lactococcus-bar-asiatique/https://www.vetofish.com/en/news/vaccin-oral-nodavirus-lactococcus-bar-asiatique/Virus-like nodavirus particles carried inside Lactococcus lactis reduced brain viral load in orally vaccinated Asian seabass, offering a promising but still experimental platform.Sat, 18 Jul 2026 00:00:00 GMTAquacultureviral nervous necrosisoral fish vaccinesAsian seabass healthLactococcus vaccine carriervirus-like particleshatchery biosecurityhttps://www.vetofish.com/en/news/xenope-reproduction-naturelle-raffinement-3r/https://www.vetofish.com/en/news/xenope-reproduction-naturelle-raffinement-3r/A study involving twelve Xenopus laevis obtained embryos by simulating spring and rainfall rather than injecting hCG. The feasibility signal is encouraging, but refinement and reduction still require comparative measurement.Sat, 18 Jul 2026 00:00:00 GMTResearch facilitiesXenopus laevis breedingnatural amplexusprocedure refinement3Rs in amphibian researchresearch animal husbandryhttps://www.vetofish.com/en/news/anesthesie-poissons-sauvages-recuperation-marquage/https://www.vetofish.com/en/news/anesthesie-poissons-sauvages-recuperation-marquage/Whole-lake telemetry shows that tagged fish may need several days to resume behaviour comparable with controls, long after equilibrium has returned.Fri, 17 Jul 2026 00:00:00 GMTEnvironmentwild fish welfareacoustic telemetryfish taggingMS-222 sedationelectro-immobilisationpost-release behaviourhttps://www.vetofish.com/en/news/biodiversite-stabilite-communautes-poissons-rivieres/https://www.vetofish.com/en/news/biodiversite-stabilite-communautes-poissons-rivieres/An analysis of 1,105 sites finds that species diversity and habitat mosaics can dampen fluctuations in river fish communities exposed to human pressure.Fri, 17 Jul 2026 00:00:00 GMTEnvironmentfreshwater fishriver biodiversitycommunity stabilityhuman footprinthabitat connectivitylong-term monitoringhttps://www.vetofish.com/en/news/cev-temperature-stress-carp/https://www.vetofish.com/en/news/cev-temperature-stress-carp/An experimental study links viral load, gill damage and physiological stress in koi exposed to carp oedema virus, with sharply different responses at 12 and 18°C.Fri, 17 Jul 2026 00:00:00 GMTAquaculturecarp oedema viruskoi sleepy diseasegill healththermal stresscarp biosecurityhttps://www.vetofish.com/en/news/echographie-oeufs-requin-zebre/https://www.vetofish.com/en/news/echographie-oeufs-requin-zebre/Ultrasound monitoring of 120 zebra shark eggs clarifies when embryos and abnormalities may be detected, while showing why the images must remain cautious decision-support tools.Fri, 17 Jul 2026 00:00:00 GMTPublic aquariumszebra shark breedingveterinary ultrasonographyembryo monitoringshark egg casesaquarium reproductionelasmobranch conservationhttps://www.vetofish.com/en/news/euthanasie-electrique-poisson-zebre/https://www.vetofish.com/en/news/euthanasie-electrique-poisson-zebre/A study tested electrical euthanasia of adult zebrafish groups in their housing tanks, finding that performance depended on tank volume and stocking level.Fri, 17 Jul 2026 00:00:00 GMTResearch facilitieszebrafish welfareelectrical euthanasiaaquatic research facilitiesalternating currentin-tank stunning3Rs refinementhttps://www.vetofish.com/en/news/microalgues-huile-poisson-truite-sante/https://www.vetofish.com/en/news/microalgues-huile-poisson-truite-sante/An 84-day rainbow trout trial found no detectable health penalty when Tetraselmis chui biomass replaced part of the fish-oil fraction, but commercial validation still requires longer, farm-specific testing.Fri, 17 Jul 2026 00:00:00 GMTAquaculturemicroalgae aquafeedsfish oil replacementrainbow trout nutritionintestinal healthfeed formulation trialshttps://www.vetofish.com/en/news/mycobacteries-aquariums-diagnostic-protection/https://www.vetofish.com/en/news/mycobacteries-aquariums-diagnostic-protection/A study of diseased aquarium fish shows why culture, molecular identification, clinical context and staff protection must be interpreted together.Fri, 17 Jul 2026 00:00:00 GMTPublic aquariumsfish mycobacteriosisMycobacterium marinumaquarium diagnosticscollection biosecurityoccupational zoonosishttps://www.vetofish.com/en/news/mycobacterium-haemophilum-poisson-zebre/https://www.vetofish.com/en/news/mycobacterium-haemophilum-poisson-zebre/This fastidious mycobacterium can cause systemic disease in laboratory zebrafish and persist in biofilms, calling for integrated fish and environmental surveillance.Fri, 17 Jul 2026 00:00:00 GMTResearchzebrafish healthMycobacterium haemophilumlaboratory animal biosecuritymolecular diagnosticsaquatic biofilmscolony surveillancehttps://www.vetofish.com/en/news/spironucleus-salmonicida-desinfection-ras/https://www.vetofish.com/en/news/spironucleus-salmonicida-desinfection-ras/A new Atlantic salmon study measures Spironucleus salmonicida sensitivity to UV, while a RAS biosecurity trial that remained negative even in untreated controls exposes the limits of prevention claims.Fri, 17 Jul 2026 00:00:00 GMTAquacultureAtlantic salmon healthSpironucleus salmonicidarecirculating aquaculture systemsUV disinfectionozone treatmentaquaculture biosecurityhttps://www.vetofish.com/en/news/tumeurs-poissons-aquarium-diagnostic/https://www.vetofish.com/en/news/tumeurs-poissons-aquarium-diagnostic/A retrospective study describes 63 tumours in 62 fish from 37 species and shows why a visible mass requires longitudinal records, purposeful imaging and histological confirmation.Fri, 17 Jul 2026 00:00:00 GMTPublic aquariumsfish tumourspublic aquarium medicinefish biopsyaquatic histopathologyageing aquarium populationshttps://www.vetofish.com/en/news/sutures-balises-acoustiques-requins/https://www.vetofish.com/en/news/sutures-balises-acoustiques-requins/In Port Jackson sharks, suturing internal-tag incisions reduced protrusion risk but increased inflammation and bacterial colonisation, revealing a protocol trade-off rather than a universal rule.Thu, 16 Jul 2026 00:00:00 GMTEnvironmentacoustic telemetryPort Jackson sharkwound healingsurgical suturesresearch animal welfarehttps://www.vetofish.com/en/news/biosecurite-introduction-poissons-recherche/https://www.vetofish.com/en/news/biosecurite-introduction-poissons-recherche/FELASA–AALAS recommendations provide a structured way to introduce fish colonies while protecting health status, staff safety and the reliability of research.Wed, 15 Jul 2026 00:00:00 GMTResearchaquatic facility biosecurityfish quarantinelaboratory fish coloniesepidemiological unitsoccupational zoonoseshttps://www.vetofish.com/en/news/evaluation-reflexes-ramp-poissons/https://www.vetofish.com/en/news/evaluation-reflexes-ramp-poissons/A standardised set of reflex observations can provide a rapid field measure of fish vitality, provided the protocol is validated for the species and release context.Wed, 15 Jul 2026 00:00:00 GMTEnvironmentRAMP assessmentfish releasereflex impairmentdelayed mortalityfisheries monitoringhttps://www.vetofish.com/en/news/iridovirus-aciv-e-esturgeons/https://www.vetofish.com/en/news/iridovirus-aciv-e-esturgeons/A study across eight Italian farms documents AcIV-E circulation and the diagnostic challenge posed by non-specific signs and the lack of routine cell culture.Wed, 15 Jul 2026 00:00:00 GMTAquacultureAcIV-E surveillancesturgeon farmingmolecular diagnosticsaquaculture biosecurityjuvenile sturgeon mortalityhttps://www.vetofish.com/en/news/ph-intracellulaire-regeneration-poisson-zebre/https://www.vetofish.com/en/news/ph-intracellulaire-regeneration-poisson-zebre/A fluorescent biosensor tracks an early fall and sustained rise in intracellular pH as the amputated zebrafish larval tail begins to regenerate.Wed, 15 Jul 2026 00:00:00 GMTResearchzebrafish modeltissue regenerationintracellular pHfluorescent biosensorcell signallinghttps://www.vetofish.com/en/news/visiteurs-enrichissement-alimentaire-poissons/https://www.vetofish.com/en/news/visiteurs-enrichissement-alimentaire-poissons/A two-species study shows how food enrichment, competition and visitor attendance can interact with fish behaviour in a public aquarium exhibit.Wed, 15 Jul 2026 00:00:00 GMTPublic aquariumsvisitor effectfood enrichmentfish behaviouraquarium welfarebehavioural monitoringhttps://www.vetofish.com/en/news/microhabitats-enrichissement-poissons-aquarium/https://www.vetofish.com/en/news/microhabitats-enrichissement-poissons-aquarium/Research at the Tennessee Aquarium shows how flow, depth and substrate shape fish space use, turning microhabitat choice into evidence-based enrichment.Tue, 14 Jul 2026 00:00:00 GMTPublic aquariumsenvironmental enrichmentmicrohabitatsbehaviouranimal welfarestream fishhttps://www.vetofish.com/en/news/pfas-poissons-bioindication-sante-ecosystemes/https://www.vetofish.com/en/news/pfas-poissons-bioindication-sante-ecosystemes/A US field study combines PFAS measurements in wild fish with tissue pathology and molecular responses, offering a practical model for integrated aquatic surveillance.Tue, 14 Jul 2026 00:00:00 GMTEnvironmentPFASecotoxicologybiomonitoringwild fishenvironmental surveillancehttps://www.vetofish.com/en/news/poisson-zebre-conditions-elevage-reproductibilite/https://www.vetofish.com/en/news/poisson-zebre-conditions-elevage-reproductibilite/A 20-laboratory study shows how noise, transport, feeding and stocking density can shape zebrafish behavioural outcomes.Tue, 14 Jul 2026 00:00:00 GMTResearch facilitieszebrafishreproducibilitybehaviourhousing conditionsaquatic facilitieshttps://www.vetofish.com/en/news/vaccination-orale-aeromonas-poisson-chat/https://www.vetofish.com/en/news/vaccination-orale-aeromonas-poisson-chat/An experimental killed bacterial vaccine delivered in feed improved channel catfish survival after Aeromonas challenge, highlighting both the promise and constraints of oral boosters.Tue, 14 Jul 2026 00:00:00 GMTAquacultureoral vaccinationAeromonas hydrophilachannel catfishimmunitydisease preventionhttps://www.vetofish.com/en/news/bien-etre-poissons-11-indicateurs-elevage/https://www.vetofish.com/en/news/bien-etre-poissons-11-indicateurs-elevage/A new European framework highlights 11 practical indicators to monitor farmed fish welfare, detect early warning signs and improve daily decisions on farms.Mon, 13 Jul 2026 00:00:00 GMTAquacultureanimal welfarewelfare indicatorsfish farmingmonitoringhusbandryhttps://www.vetofish.com/en/news/eclairage-aquariums-preserver-nuit/https://www.vetofish.com/en/news/eclairage-aquariums-preserver-nuit/Night-time lighting in public aquariums can alter rest, behaviour and reproduction. Practical controls can preserve natural light-dark cycles.Mon, 13 Jul 2026 00:00:00 GMTPublic aquariumslightingcircadian rhythmsanimal welfarephotoperiodlight pollution