There could be an achievement for fishing. Catch 25 of each kind of fish in Faiumoni.
A similar idea has been added to ideas page on the wiki: https://stendhalgame.org/wiki/Stendhal_Achievement_Ideas
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Added to CVS 2013-10-02: http://stendhalgame.org/development/sourcelog/2013-10.html
Changed to "Catch 15 fish of each king".