obviously he didn't like being filmed ![URL=https://www.icmag.com/ic/picture.php?albumid=66162&pictureid=1789472&thumb=1]View Image[/url]
obviously he didn't like being filmed !https://www.icmag.com/ic/picture.php?albumid=66162&pictureid=1789472View Image
Well I'll be a son of a bitch.
When the cardinalfish sucks up what it thinks will be dinner, the tiny sea creature, a type of ostracod, emits a burst of light. That burst saves the ostracod's life — by getting it spat out. Not all ostracods create these light shows, and these cardinalfish can't tell which tasty morsels will do so before eating them.
But when that bad boy lights, up, the fish really has a problem. If you have a lot of predators in the wild, then it's best to stay hidden. That's why the fish in the tank vomit up the tiny bioluminescent ostracods. Otherwise, their bodies would illuminate from within, calling out to their predators, "Here's DINNER!" and getting them eaten for sure.