Fish, salmonid family
Brook trout
- Maximum length
- 86cm
- Maximum weight
- 9,4kg
- Best water temperature
- 6–14 °C
- Water today (4.0 °C)
- Tolerates it, but slowed down
- Fishing districts near where it occurs
- 2
About the species Brook trout
How to recognise it
Green-brown body with a marbled pattern on the back, red spots with blue edging and a white stripe on the leading edge of the lower fins.
Where it lives
Cold mountain streams and tarns. Originates from North America.
What it feeds on
Insects, shrimps and small fish.
Spawning
In October and November on gravel in cold water.
A non-native species that is stocked into selected waters. It is fished similarly to trout.
Closed season, minimum size and daily limit
What the Fisheries Act says about brook trout. For guidance only; check it in the fishing regulations of the district.
Minimum size
§ 12 of the Decree27 cm
below the size limit: return it to the waterfrom the size limit: you may keep it
You must not keep a fish shorter than 27 cm. The total length is measured from the front of the head to the end of the longest ray of the tail fin (§ 12, para. 4). The district user may raise the size; the one in the permit and the fishing regulations applies.
Daily limit
§ 14 of the Decree- 4ksYellow grouprainbow trout, brook trout, common nase, vimba bream; added to the green or blue group (at most 4 fish in total)
The limit applies per day, also when fishing in several districts. The district user may set a lower limit in the permit, in which case the stricter one applies.
Summary of Act no. 216/2018 Coll. and Decree no. 381/2018 Coll. (as of 6 Nov 2026). It may be out of date or contain an error, and exceptions apply on some waters. The permit and the fishing regulations of the district are binding. The fishing law, rule by rule.
Water temperature and requirements
At what temperature the species is active and how well today's water suits it.
Tolerates it, but slowed downTypical water in Slovakia is 4.0 °C today. The species tolerates this temperature (0 to 20 °C), but the water is colder than the ideal 6 to 14 °C. Fish tend to be slower and pickier.
- tolerates 0 to 20 °C
- best 6 to 14 °C
- spawning at 8 to 11 °C
- typical water today 4.0 °C
- Length
- up to 86 cm
- Weight
- up to 9.4 kg
- Oxygen
- Requires a lot of oxygen
- Position in the food chain
- 3,4omnivore and small animals
The values are indicative and come from the FishBase database. In a particular water, fish behave according to the weather, air pressure, oxygen and food.
Where it was recorded
Fishing districts around which a record of this species exists (GBIF).
2 fishing districts in total. Show on map
Similar species
Photo credits
- Brook trout: Photo: Karelj, Public domain, Wikimedia Commons
- Brown trout: Photo: USFWS Mountain Prairie, Public domain, Wikimedia Commons
- Rainbow trout: Photo: This image originates from the National Digital Library of the United States Fish and W…, Public domain, Wikimedia Commons
Minimum sizes, protection periods and permitted fishing methods are set by the fishing regulations and the conditions of the specific fishing district. Check them before you fish.