CAIRO (AP) — A recreational submarine taking 45 tourists on an underwater cruise of coral reefs in the Red Sea sank off the Egyptian resort town of Hurghada on Thursday, leaving six Russians ...

Coral reef ecosystems are generally high in biodiversity, most often found in shallow tropical seas, and are threatened by factors including ocean acidification, global warming and sea level rise.

The pair were stuck in an oyster reef for 16 hours before they were rescued, according to the outlet. ABC News “The high tide kind of pushed them up into that area … and kind of held on to ...