6 1/2 ft minimum
6 feet
About 6 feet
12.8 meters. It depends on the Olympic water polo pool it is.
The dimensions of an Olympic size swimming pool is approximately 164ft x 82ft and 6ft deep.Source: arthurspools.com
16 feet
The Olympic pool in China is reported to be 3m deep. ---- For top class water polo the minimum water depth is 1.8m
six feet at 7 inch minimun
2 feet 6 inches deep
40 to 50 feet
5,000 feet of water depth is about 147.5 atmospheres.
20000
six feet
It lives worldwide in deep water at depths of about 3,300 feet.