Sea coin

Distribution : Mediterranean · Red Sea · Indian Ocean · Pacific Ocean · Caribbean Sea

Marine region

In Greek mythology, Poseidon ruled the sea alongside many other marine deities. One of them was Halimede, a sea nymph whose name was later given to a green alga. In French, the same seaweed is called ‘Poseidon's coins’, after its round green segments that resemble old coins.

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Habitat

Rocky habitat

Depth

1-70 m

Group

Role

Primary producer

Average size

Ø 15 cm

WHAT DOES IT LOOK LIKE?

The sea cactus’s little pieces are flattened segments, round or paddle-shaped. They join and branch in one plane.

The alga is green, sometimes paler. Its segments contain calcareous mineral material that gives them some stiffness.

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WHERE DOES IT LIVE?
WHAT DOES IT EAT?
HOW DOES IT REPRODUCE?
OUR OBSERVATIONS

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