A CK-MB test may be used as a follow-up test to an elevated CK in order to determine whether the increase is due to heart damage or skeletal muscle damage.
Scuba organizations say recreational divers shouldn't go below about 130 feet, but one Egyptian diver recently ventured a bit deeper -- going more than 1,000 feet below the ocean surface and setting a world record in the process.
The bottlenose dolphin can reach depths of at least 30 metres. However, most of Shark Bay is quite shallow. Thus the dolphins at Monkey Mia typically don't dive much deeper than 12-15 metres.