Because they should
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.
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.
by snorkeling and scuba diving
=it helps you breath easily underwater, so you dont haave to keep going up for air=
Use a sub.,scuba gear, or a camera.
in areas with great Marine life or coral reefs (Bahamas, Miami, Australia, etc...)
For recreational purposes you can scuba dive, but the coral reef also provides educational opportunities in marine biology.
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
Free divers do but scuba divers do not need to. Scuba divers take their air with them and would have no need to hyperventilate.