First, あなた have to get the main treasure that's in the big clam's mouth.

Second, あなた have to get the rare treasure. There are five tiny clams with tiny, white pearls. One has a black pearl, that is the main treasure.

Third, あなた need to complete it witout losing a sub. あなた can do this in step one または two, または if あなた didn't get it then do it now. if あなた don't do it, あなた can't 移動する on to step four.

Fourth, あなた have to do it timed. During that time, あなた may see the giant squid. (Check 写真 to see what it looks like!!)

Fith, あなた have to do it in compressed air mode, meaning that あなた can't touch anything, otherwise あなた lose your sub. Plus, あなた -will- go very fast.