Captative verbs indicate catching and hunting of the specific animal or other target, e.g. English to fish.
Usually captatives are not separately marked, but some Uralic languages do this. Nenets, Sami languages and Finnish have a captative marker for marking captative verbs; in Nenets, the marker is exclusively used for this purpose. For example, Northern Sami murjet "to pick berries" is derived from muorji "berry". Also, Finnish has captative verbs marked by -sta-, e.g. marja/sta/a "to pick berries", kala/sta/a "to fish", metsä/stä/ä "to hunt".
Tapani Salminen. Tundra Nenets grammatical sketch.