Every so often we get stories that go along the lines of :
"I went out to the kitchen in the middle of the night to get a glass of water. I didn't turn the light on and I saw the food in the cat bowl was glowing!
Is it radioactive?"
Most spectacular when it is calamari rings.
No, it is not radioactive, it is just active. With bacteria.
Pseudomonas fluorescens. A common spoilage bacteria that secretes a fluorescent pigment. It is generally harmless to humans unless they are already immunocompromised.