Open Water
groper
The collective noun is a bubble of scuba divers.
Many people use a SCUBA suit for diving. Sport divers, police divers and some Navy recovery divers.
scuba divers
SCUBA diving is a threat to coral reefs because divers are not careful when they swim. Even if they don't actually damage the reef by breaking off bits of coral, they produce currents with their flippers that scatter the sand and stuff all over and disturb the animals in the reef.
Free divers do but scuba divers do not need to. Scuba divers take their air with them and would have no need to hyperventilate.
They swim
seebees
Heart Reef is located in the Great Barrier Reef Marine Park, Airlie Beach, Whitsunday Islands, Queensland, Australia. It is located in Hardy Reef. Heart Reef must be viewed from the air as the area is protected and snorkelers and scuba divers are not allowed to enter. Heart Reef was discovered in 1975. It is named for its shape.
In the Water....
Scuba - self contained underwater breathing apparatus