A whole new ocean zone is needed for these fish species

Scientists currently classify groups of reef species by the depths at which they occur, with the so-called “mesophotic” species living at depths of 40-150 meters. Now, though, new data suggests that an additional depth zone is needed for reef species living in the coral reef twilight zone, to be called the “rariphotic” zone, covering the depths of 130-310 meters (400-1000 ft). Species at these depths are far more closely related to shallow-water species than to deep-water species, report the group, which includes SAFS professor Luke Tornabene. The proposal is published in the journal Scientific Reports and also covered by Phys.org.

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