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Marine Biology

Across
It's what kept the water outside the bucket and air in.
Used hallow tubes to breathe underwater
Underwater breathing apparatus
Hid in a barrel during the siege
Developed by Jaque Cousteau and Emile Gagnan
Goes back before 500 BC
Number of pieces on the original Navy diving suit
Down
Assisted in keeping the diver from rising back to the top
Known as the father of scuba diving
Material of first suit
Standard Navy diving helmet was made of this
Transported divers to depths of the ocean
Designed suits to stay longer in the water