VU

Berthella sideralis

Unknown

Overview

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

Berthella sideralis faces significant pressure from coastal development and pollution in its limited Mediterranean range. The species' shallow-water habitat makes it particularly vulnerable to marine pollution, including plastic debris and chemical runoff from coastal urbanization. Climate change-induced warming of Mediterranean waters may be altering the delicate ecological balance this nudibranch depends on for survival.

Threat summary

Habitat

This marine nudibranch inhabits shallow coastal waters of the Mediterranean Sea, typically found on rocky substrates and among algae in the subtidal zone. It prefers areas with good water circulation and abundant sponge growth, which forms part of its diet.

MARINE· major

Other threatened species in Pleurobranchidae

Rough Side-gilled SeaslugVU

Rough Side-gilled Seaslug

Pleurobranchus membranaceus

Unknown

Threatened in Norway

VU

Lepiota echinella

Unknown
EN

Lyophyllum deliberatum

Unknown
VU

Large Tree-chernes

Dendrochernes cyrneus

Unknown
VU

Lesser White-fronted Goose

Anser erythropus

Declining

Frequently asked questions

Why is Berthella sideralis classified as Vulnerable?
Berthella sideralis 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. Berthella sideralis faces significant pressure from coastal development and pollution in its limited Mediterranean range. The species' shallow-water habitat makes it particularly vulnerable to marine pollution, including plastic debris and chemical runoff from coastal urbanization. Climate change-induced warming of Mediterranean waters may be altering the delicate ecological balance this nudibranch depends on for survival.
Where does Berthella sideralis live?
Berthella sideralis occurs in Norway, and Sweden. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Berthella sideralis?
The main threats to Berthella sideralis 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.

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