Sarah McAnulty and Andrea Suria, two Ph.D. students at the University of Connecticut, are working to understand how the immune system of Hawaiian Bobtail Squid is able to mediate the symbiosis between the squid and its bacterial symbiont, Vibrio fischeri:
The Hawaiian Bobtail squid has a glowing bacterium that lives in a specialized organ on their underside. As the squid swims at night, the bacteria glow, preventing predators from detecting the squid's silhouette against the moonlight. Squid immune cells are able to distinguish beneficial from harmful bacteria and know to kill only harmful bacteria. Our lab researches how the immune system makes this decision.
But the squid are hungry little guys who need lots of shrimp. So they (McAnulty and Suria, not the squid) have taken to crowdfunding site Experiment (like Kickstarter, only for science). Here's their project page, "How do Bobtail Squid choose their glowing bacterial partner?", and their video pitch: