Simple identification tools for fish species were included in the
FishBase information system from its inception. Early tools made use of
the relational model and characters like fin ray meristics. Soon pictures and
drawings were added as a further help, similar to a field guide. Later came
the computerization of existing dichotomous keys, again in combination with
pictures and other information, and the ability to restrict possible species
by country, area, or taxonomic group. Today, www.FishBase.org offers four
different ways to identify species. This paper describes these tools with their
advantages and disadvantages, and suggests various options for further
development. It explores the possibility of a holistic and integrated computeraided
strategy.
