| The fairly deep bowls of the platforms constitute enclaves for a flora and a fauna that belong to the biocenosis of photophilous algae. |
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| The Posidonia oceanica meadow represents over one quarter of the photophilous biotopes of the Mediterranean infralittoral. |
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| The fauna is probably made up of species met with among the photophilous algae, found in most phanerogam meadows. |
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| Betula nana is a photophilous species, which prefers open spaces that are not overgrown by trees. |
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| The biocenosis of photophilous algae is a biocenosis that is extremely rich and of great complexity, due to the strong physical gradients existing at its level. |
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| It is sometimes difficult to situate the transition with the lower horizon of the photophilous algae, since many coralligenous species go up into this horizon. |
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| This association, described by Molinier in 1958, forms belts in the photophilous biotopes where there is strong wave action, and whose rocky substratum is subvertical. |
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| The Rayolet site is very heterogeneous, characterized by Posidonia oceanica seagrass meadows, rocks covered with photophilous algae, some areas of gravel, and patches of sand. |
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