---
title: "Bagnik nadwodny"
description: "Dolomedes plantarius — Owady i pająki. The great raft spider or fen raft spider (Dolomedes plantarius) is a European species of spider in the family Dolomedidae."
canonical: https://animalchecklist.com/pl/animal/fen-raft-spider
last_updated: 2026-09-20
---

# Bagnik nadwodny

> Dolomedes plantarius — Owady i pająki. The great raft spider or fen raft spider (Dolomedes plantarius) is a European species of spider in the family Dolomedidae.

- Scientific name: *Dolomedes plantarius*
- Category: `insects` (Owady i pająki)
- Habitats: `freshwater` (Jeziora i rzeki)
- iNaturalist observations: 407
- Wikidata: [Q2090659](https://www.wikidata.org/wiki/Q2090659)
- iNaturalist taxon: [99498](https://www.inaturalist.org/taxa/99498)

## Names

- en: Fen raft spider
- de: Große Jagdspinne
- fr: Dolomède des roseaux
- nl: Grote oeverspin
- pl: Bagnik nadwodny

## Countries with the most observations

RU (21), DK (15), GB (12), SE (10), FR (9), PL (8), IT (6), HU (4), LT (4), DE (3), TR (3), UA (3)

## Summary

The great raft spider or fen raft spider (Dolomedes plantarius) is a European species of spider in the family Dolomedidae. Like other Dolomedes spiders, it is semiaquatic, hunting its prey on the surface of water. It occurs mainly in neutral to alkaline, unpolluted water of fens and grazing marsh.

Text: Wikipedia (en), CC BY-SA 4.0 — https://en.wikipedia.org/wiki/Great_raft_spider

## Photo

![Bagnik nadwodny](https://animalchecklist.com/img/animals/fen-raft-spider/medium.jpg)

Photo: Tero Linjama · CC0 · inaturalist — https://www.inaturalist.org/observations/181932439

## Machine access

`GET https://animalchecklist.com/api/v1/animals/fen-raft-spider?lang=pl` — see [openapi.json](https://animalchecklist.com/openapi.json).