Inhabits shallow rocky areas . Probably a deep dweller that migrates to coastal areas in August . Uncommon species . Nocturnal, hides in caves during the day .
Physical description for Grammonus Ater is currently being compiled.
Behavioural data for Grammonus Ater is currently being reviewed.
Diet information for Grammonus Ater is currently being compiled.
Reproduction data for Grammonus Ater is currently being compiled.
Marine; reef-associated; depth range 5 - 30 m. Subtropical; 47°N - 30°N, 1°E - 20°E
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