Maraene
VU

Maraene

Coregonus maraena

UnknownVUEUVUEU

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Coregonus_maraena

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

The Maraene faces severe population declines primarily due to overfishing and habitat degradation in its Baltic Sea range. Dam construction and water regulation have blocked traditional spawning migrations, while eutrophication from agricultural runoff has degraded water quality in critical breeding areas. Climate change is altering water temperatures and salinity levels, disrupting the species' complex life cycle between marine and freshwater environments.

Threat summary

Habitat

The Maraene inhabits the brackish waters of the Baltic Sea and its tributaries, requiring both marine and freshwater environments to complete its anadromous life cycle. It spawns in rivers and streams with gravel substrates, while adults feed in coastal marine waters and estuaries.

FRESHWATER· majorMARINE· major

Other threatened species in Salmonidae

VU

Pelagonian trout

Salmo pelagonicus

Unknown
Coomasaharn charrVU

Coomasaharn charr

Salvelinus fimbriatus

Unknown
Blunt-snouted charrCR

Blunt-snouted charr

Salvelinus obtusus

Unknown
CR

Spring spawning cisco

Coregonus trybomi

Unknown

Threatened in Czechia

Calidris ferrugineaVU

Calidris ferruginea

Declining
Anthophore estivaleCR

Anthophore estivale

Anthophora aestivalis

Unknown
Adonis BlueVU

Adonis Blue

Lysandra bellargus

Unknown
agnhodeedderkoppCR

agnhodeedderkopp

Walckenaeria alticeps

Unknown

Frequently asked questions

Why is Maraene classified as Vulnerable?
Maraene is classified as Vulnerable because the population is declining and the species faces a high risk of extinction in the medium-term future if current pressures continue. The Maraene faces severe population declines primarily due to overfishing and habitat degradation in its Baltic Sea range. Dam construction and water regulation have blocked traditional spawning migrations, while eutrophication from agricultural runoff has degraded water quality in critical breeding areas. Climate change is altering water temperatures and salinity levels, disrupting the species' complex life cycle between marine and freshwater environments.
Where does Maraene live?
Maraene occurs in Czechia, Denmark, Finland, Germany, Ireland, and Japan (plus 7 other countries). Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Maraene?
The main threats to Maraene are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

Get weekly conservation intelligence

One short digest a week of the most striking species and country data we ship, plus breaking conservation news paired with our database where it matters.

Free, no spam. One-click unsubscribe in every email.