People spearfishing for fish under a popular city ocean jetty walkway

artificial reef spearfishing hunting ocean infrastructure water fishing watersports freediving catch ecofriendly equipment sustainable sustainability reef gold coast jetty sand bypass queensland australia speargun drone high view 4k tropical water snorkeling blue water tropical destination protected species marine biology marine conservation fish recreation nature wildlife water activity fins ecosystem primary industries spearfish food spear gun kill hold breath wetsuit float fisheries apnea reef system