Leptoseris is a genus of corals belonging to the family Agariciidae.

The genus has almost cosmopolitan distribution. Leptoseris corals are found all over tropical waters in the Indo-Pacific ocean and over a range of depths but mainly the mesophotic zones. Leptoseris can be observed at depths ranging from shallow to extreme depths (over 100m).

They have a mutualistic relationship with microalgae called Symbiodinium that gives them the flexibility of photo-acclimatization and photoadaptation to the varying depths.

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