D700 500mm ISO200 f/4.5 1/60 tripodIn addition to anchoring the tree to the muddy soil, the mangrove roots have two important roles: (a) they filter salt out of the water (balance salt intake is evacuated through the leaves); (b) they develop aerial breathing "snorkels" to avoid suffocation in the oxygen poor mud.
The darker section of the roots on the above picture show the level of water at the highest tide.
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