SS Yongala · Great Barrier Reef
10 species, most likely first·How chances work
Queensland grouperData Deficient
Almost always
Nearly every dive
Giant trevallyLeast Concern
Great barracudaLeast Concern
Humphead wrasseEndangered
Olive sea snakeLeast Concern
Spotted eagle rayEndangered
Bull sharkVulnerable
Likely
About half of dives
Reef manta rayVulnerable
Dwarf minke whaleLeast Concern
Now and then
Only now and then
Green sea turtleLeast Concern
What the labels mean