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White-spotted octopus

Distribution : Mediterranean

Mediterranean monk seal droppings, some preserved for years, have yielded unexpected details about the animals’ diet. A study published in Global Ecology and Conservation in 2025 identified DNA from the white-spotted octopus in two samples. Since this octopus is primarily nocturnal, the finding raises a question: do monk seals catch it while hunting at night, or can they extract it from its daytime shelters? The genetic evidence cannot distinguish between these possibilities.

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Habitat of White-spotted octopus Habitat
Sand, Rocky habitat, Coralligenous habitat
Depth range of White-spotted octopus Depth
5-50 m
Biological group of White-spotted octopus Group
Ecological role of White-spotted octopus Role
Predator

Average size

13 cm

WHAT DOES IT LOOK LIKE?

Very slender arms extend far beyond the body proportions of the white-spotted octopus (Callistoctopus macropus), giving it a stretched outline. White spots scatter across the red to reddish brown body and arms.

The skin can change shade rapidly. Small contrasting spots and arm length complete its outline, while colour alone is not decisive.

WHERE DOES IT LIVE?

It frequents different seabed types, particularly sandy, rocky or seagrass-covered ones. Inconspicuous by day, it stays hidden in a shelter, beneath a stone or in a cavity, and becomes active at nightfall.

WHAT DOES IT EAT?

With arms spread over sand, the Atlantic white-spotted octopus explores the seabed at night. It can search for buried bivalves, hold them with its suckers and carry them to the den before eating. Crustaceans, fish and other octopuses also enter its menu. Shellfish are only part of its diet, but their collection provides a well-documented sequence: exploring a sandy patch, holding a catch beneath the arms and moving away with it. Night offers more opportunities to follow this activity than daytime encounters.

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White-spotted octopus

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