BIoLooKIA is a multilingual website focused on biological species and nature-related information. Its reference lists cover mammals and fish across several European regions, including Britain, Germany, Poland, and Sweden. Visitors can browse regional mammal lists, explore fish found in the North Sea, Baltic Sea, and Black Sea, and consult freshwater fish lists for the featured countries. The site also offers identification guides for fish from the Baltic and Black seas, helping readers explore species in these waters.

Alongside its species directories, BIoLooKIA publishes articles on a broad range of biological and environmental topics. The topics represented include animal behavior, newly identified species, plants, agriculture in saline soils, genetics, and the biology of soy. Some articles also examine microbial life, the origins of dinosaur extinction, and the linguistic abilities of chimpanzees. Content appears in multiple languages, including English, Bulgarian, German, Georgian, Polish, Romanian, Russian, Turkish, Finnish, Swedish, and Ukrainian. Presented as a resource for exploring species and related scientific subjects, BIoLooKIA combines searchable-style regional lists with accessible articles.