Fish that Bite or sting
Of the 1500 species of Fish that live on the reef less than 1% will actually bite or do you some harm.
It is highly unlikely to get bitten by a fish unless you really provoke it.
If bitten or stung by a fish seek medical attention straight way.  Staff will need to ascertain what type it was  before assisting in first aid.
When passengers are walking in water without footwear advise them to shuffle there feet so they don't stand on anything sharp or a fish.

Turtles
Local turtles will accompany divers and snorkelors, it can be easy to get up close to these magnificent creatures. But please rember do not try and hang on to or pat a turtle. Their hugely powerful jaws could easily remove a fingure.
Stonefish
The stonefish is the most venomous fish in the world. Although reports of stings around the Whitsunday Islands are extremely uncommon they can be found on the reef bottom, camouflaged as a rock.  Its dorsal area is lined with 13 spines that release a venomous toxin. It stung by one of these fish medical attention must be sort after straight away.
If stung it is agonizingly painful.It is accompanied with acute swelling, spreading up the limb from the wound, which may persist for many weeks. No deaths have been reported in Australia.
Scorpion fish
– Butterfly cod are found around coral reefs. They sometimes approach divers  pointing there dorsal spines in front of them as they get near. These spines have glands which produce venom. It produces a severly distressing sting, which usually subsides within a couple of hours. Local effects are usually the most significant. Vomiting and fever are sometimes reported.
First aid immerse the wound in hot water ( but not scalding water) as hot as they can take it
Box Jelly fish
The box jellyfish is a potential hazard to swimmers along the queensland coast. They have a box like shape. They are agile swimmers and can maintain a pace of three to four knots. The extended threads of the jellyfish are 0.2 millimeters long and long enough to penetrate the skin of a normal adult( except on the palms of the hands and where the skin is thicker). The sting is extremely toxic that effects the skin, blood and heart muscle.Aways were a stinger suit when Swimming in Stinger season in all waters of the great Barrier Reef.
IrunkjandJi Jellyfish
Irukjandji are not considered deadly, however their have been known fatalities that have occurred as a result of being stung. In most cases the fatality was caused by a complication that came from a pre-existing condition such as high blood preasure. Little is known about the biology of any of the jellyfish that cause ‘irukandji syndrome’. Carukia barnesi is a small, transparent jellyfish which is about 25 mm across the body or ‘bell’ with a single tentacle from each corner of its box-shaped body.