Meet the infamous triggerfish! 🌊 These fish create nests in soft sand on the ocean floor, right out in the open. With an exposed nest creating a wide area for the fish to defend, some – such as the titan triggerfish – are known for their aggression towards intruders. Have you encountered a triggerfish while diving? Let us know your experience in the comments below! 📺: Australian Geographic Extraordinary Animals is now airing on NITV on Sunday nights at 7.30pm. Episodes are available to stream

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The Clown triggerfish. The Clown triggerfish has got to be one of my favourite fish on the reef and is always incredibly relaxed. These little fish have trigger-like spines on the tops of their bodies that will pop when threatened, but they use it more like an anchor than anything else, locking them into small spaces to stop predators from getting to them. Post by Master Reef Guide Abby Marine Discoveries, Cairns | Master Reef Guides