How should we monitor welfare in the ornamental fish trade?

The global ornamental fish trade is a multibillion-dollar industry, with legal estimated to be worth between $15 and 20 billion per annum. Although there existing legislation concerning the improvement of welfare in aquaculture research, little surrounding pet fish. different phases trade, including curation, transportation, time spent at wholesalers/retailers domestic/public aquaria, represent concerns. Within animal field increasing interest improving through creation operational indicators (OWIs), where individual are aggregated assess welfare. OWIs can morphological, behavioural, physiological, metabolic or abiotic nature, behaviour often considered as foremost non-invasive method elucidating Currently, while exist for food species, no use within trade. This review looks briefly stressors experienced by then used systematic approach (keywords behavio* AND fish* welfare) identify relevant publications investigating behavioural measures species. Finally, this considers potential development