<p>Back in February, co-founder of Lionfish University Jim Hart <a class="link" rel="nofollow" target="_blank" href="http://newswire.storyful.com/storylines/*/stories/94195">recorded</a> what is thought to be the first piece of footage of a grouper eating an invasive lionfish without human intervention. The non-profit organisation has studied fish behavior extensively, but it wasn’t until May 2015 that they captured footage of a trumpetfish shadow feeding with a tiger grouper. The trumpetfish proved to be an unwelcome hitchhiker stalking his prey. Credit: YouTube/LionfishU</p>