Triggerfish are a fascinating fish that live on reefs and flats throughout the world. A video from BBC Earth shows these fish guarding a reef.
From BBC Earth:
“An over abundance of crown-of-thorns starfish and long-spined sea urchins can be damaging for coral reefs. Luckily, there is a renowned defender of the reefs ready to take them on…”
To check out more from BBC Earth, please click here.