kalaliigist
Kalaliigist is a term that generally refers to a species of fish. In Estonian, "kala" means fish and "liigist" is the genitive case of "liik," meaning species or kind. Therefore, "kalaliigist" literally translates to "of a fish species." It is used when discussing the characteristics, habits, or conservation status of a particular type of fish.
When scientists or ichthyologists refer to a kalaliigist, they are focusing on the unique biological traits
For example, if one were discussing the Baltic herring, they would be referring to a specific kalaliigist