Least Concern· population increasing· assessed 2015

Conger eel

Conger conger

Sighting evidence at Cassidaigne Seamount, Marseille Calanques

Photo: Kevin Bryant · CC BY-NC-SA

One of the largest bony fish in European waters, the conger eel can exceed 2 m and 60 kg. Congers are powerful nocturnal hunters of fish, crustaceans, and cephalopods and are highly site-faithful, returning to the same overhang or cave mouth across many years. At Cassidaigne, large individuals inhabit the deepest recesses of the seamount and are frequently encountered by divers hovering at the base of the structure.

Evidence at this site

155 records within 25 km

Confidence: high

Last confirmed Jun 2026

Seasonality

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How is this calculated?

Sighting evidence is compiled from iNaturalist observation records within a set proximity radius, filtered for quality-grade observations. “Last confirmed” is the date of the most recent research-grade record. Record count covers a rolling 24-month window. Confidence reflects record count, recency, and consistency of seasonal signal.

Conger eel

Evidence at this site

Seasonality

Also seen at other sites