This one is totally new to me

I never heard of a clam with flashing (reflector) lights until I read this article (with a video).

How the flashy disco clam lights up the sea

What's also interesting is that the lights aren't bioluminescence, they are simple light reflections off of silica microspheres.

I looked, but I couldn't find a microphotograph of the microspheres, which the researchers are calling silica nanobeads.

But I'll keep trying.