Imagine making a shrimp dinner and dimming the lights, only to find the shrimp glowing in the dark. That's just what happened to Randall Peters of Seattle last week.
Nervous, he was worried about radiation making the shrimp glow. But a more mundane explanation is likely, bacterial luminescence. Glow in the dark bacteria are not rare, and glowing seafood has been uncovered before.
So if you find your seafood glowing, you probably don't need to worry about being poisoned. Unless you forgot to refrigerate it or otherwise created a risk of food poisoning from bad handling.
Now these genetically modified glowing zebrafish, that's a horse of a different color. Fluorescent transgenic fish that you can buy for your home aquarium.