Because they should
So that the divers are able to take pictures, provide research, and monitor the sea life and the changing temperature
=it helps you breath easily underwater, so you dont haave to keep going up for air=
They sometimes do cause damage to the reefs, but are not usually to blame for killing entire reefs; that is something that only larger forces can cause, such as climate change or a huge hurricane.
The collective noun is a bubble of scuba divers.
scuba divers
Many people use a SCUBA suit for diving. Sport divers, police divers and some Navy recovery 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
In the Water....
Scuba - self contained underwater breathing apparatus