Divers spot 71 fish species in deep ocean 'twilight zone'
Spanning around 80 submersible dives up to a depth of 1,000 feet, American researchers have observed 4,500 fish representing 71 species in the Carribean island of CuraÃ§ao. The researchers made the discovery while testing a hypothesis that shallow-water coral reef species seek refuge in deeper low-light "twilight" zones to avoid warm waters and coral deterioration caused by climate change.