Follow your buddy, shoot what they shoot. My friend Marie has the ability to find great “shit.” And she breathes slow! Way slow! She can get an hour and a half from a single tank. Newbies get about thirty minutes. I got an hour. After I learned to breathe more slowly and rhythmically from her (by watching her) I could get way more dive time. And more pictures! Meanwhile, she was taking pics of the male fish (see the teeth) with eggs in their mouth. And I did too! Yay! I once saw a fern in Jamaica whose leaves shrink when touched – sort of like scrunching up when a rain drop would hit. Coral does too – some types – as in you can write things in the coral. But once one coral shrinks the whole lot seems to follow. So, it’s a trick to write letters in the shrinking coral. Good luck.