Invertebrates
Antarctic Limpet
Nacella concinna · also called Antarctic limpets
Clamped tightly to rock in a zone regularly scoured by drifting ice, an Antarctic limpet quietly dominates the grazing role along much of the Antarctic shoreline, scraping algae from stone that few other animals can survive long enough to exploit.
Overview
The Antarctic limpet, Nacella concinna, is a Least Concern invertebrate native to ocean and polar habitat across the intertidal and shallow subtidal zones surrounding the Antarctic Peninsula and nearby islands. Its dominant grazing role, resilience to natural ice-scour disturbance, and strong rock-clinging foot make it one of the more ecologically important invertebrate species found anywhere along the Antarctic shoreline.
Life in a zone built to destroy it
Few habitats are as regularly and violently disturbed as the Antarctic intertidal zone, where drifting ice can scrape a rocky shoreline clean without warning, yet the Antarctic limpet has built its entire way of life around surviving and quickly recolonising exactly this kind of punishing environment.
Status
Least Concern, remaining abundant across suitable rocky coastal habitat, though facing ongoing exposure to natural ice-scour disturbance and long-term uncertainty linked to a changing Southern Ocean.
Antarctic Limpet: common questions
Why is the Antarctic limpet important to its ecosystem?
This species is the dominant grazing animal across much of the Antarctic intertidal and shallow subtidal zone, playing a major role in controlling how much algae grows on rocky surfaces there.
How does the Antarctic limpet survive ice scour?
This species survives in a habitat regularly scoured by drifting icebergs and sea ice by clamping tightly to rock with a strong, muscular foot and often retreating to deeper water during the harshest winter months.
What does the Antarctic limpet eat?
This species is a herbivore that scrapes algae and diatoms from rock surfaces using a specialised feeding structure called a radula, grazing much like a snail on land.
Where is the Antarctic limpet found?
This species is native to the intertidal and shallow subtidal zones surrounding the Antarctic Peninsula and nearby islands, clinging to rocky surfaces exposed to the Southern Ocean.