North Horn (Osprey Reef) · Great Barrier Reef
8 species, most likely first·How chances work
Giant trevallyLeast Concern
Almost always
Nearly every dive
Green sea turtleLeast Concern
Silvertip sharkVulnerable
Grey reef sharkEndangered
Likely
About half of dives
Whitetip reef sharkVulnerable
Dogtooth tunaLeast Concern
Now and then
Only now and then
Dwarf minke whaleLeast Concern
Scalloped hammerheadCritically Endangered
What the labels mean
