A person spearfishing above an artificial reef hunting for fish using a spear gun

great barrier reef snorkeling spearfishing marine conservation artificial reef marine biology australia coral bleaching swimming flipper float underwater pacific drone scuba equipment blue water fish adventure tourism fins tropics tropical destination coral water activity wildlife predator protected species fish food ecosystem dive apnea travel destination fish feeding feeding frenzy animal travel explore tourist catch beach animal encounter global warming excitement nature breath hold recreation hunting primary industries spear gun kill