V/A fischeri (a lot of people still haven't gotten used the renaming from vibrio) is really fascinating. Slight point of clarification- quorum sensing happens b

V/A fischeri (a lot of people still haven't gotten used the renaming from vibrio) is really fascinating. Slight point of clarification- quorum sensing happens between the bacteria where they detect the amount of other bacteria present, not through a signal from the squid. It's a phenomena that has a lot of importance in bacterial disease and infections as well - one of those classic cases where a scientist that wanted to study a random cool phenomenon ("but why squid glow?") advanced a fundamental understanding with broad implications. You can see quorum sensing in action by culturing some V fischeri in a petri dish and observing luminescence when they read high enough numbers. You might be able to buy an educational kit online - it's not a dangerous bacteria (my professor let us take home our plates to culture them out to see them glow in our dorms). Super cool stuff.