Biodiversity knowledge through web design: the World of Crayfish platform

Biodiversity databases have expanded rapidly over the past two decades, transforming scattered observations into massive digital repositories of species occurrence records. Yet increased data availability has not necessarily translated into improved accessibility of ecological knowledge. Most biodiversity platforms remain primarily data archives, requiring substantial analytical effort before meaningful biological insights can be extracted. Bridging this gap between stored data and usable knowledge represents a central challenge for biodiversity informatics. Here we present the design philosophy and functionality of the World of Crayfish® platform (https://world.crayfish.ro), a web-based system built around the user experience of transforming species occurrence data into accessible biodiversity knowledge. Through interactive spatial visualization, automated narrative synthesis, structured bibliographic outputs, and standardized data export tools, the platform enables users to move directly from species selection to interpretable biogeographic insight, without requiring specialized analytical expertise. Using freshwater crayfish as a model group, the platform illustrates how web design can function as a critical interface between complex biodiversity infrastructures and diverse user communities, including researchers, conservation practitioners, and decision makers. By prioritizing clarity, transparency, and reproducibility in how biodiversity information is presented, the World of Crayfish® platform demonstrates how user-centred web design can lower the barrier between complex biodiversity infrastructures and the diverse communities who need to use them.