Emitting light through biological processes.

Producing luminescence in living organisms.

Generating natural light without heat production.

Exhibiting fluorescence as a metabolic function.

Shining due to biochemical reactions within cells.

**Natural Glow**: Emitting light through biological processes.

**Organism-specific**: Pertaining to organisms that produce bioluminescence.

**Chemical Reaction-based**: Resulting from biochemical reactions in living cells.

**Ecological Functionality**: Serving a purpose in an organism's environment or behavior.

**Visual Signaling Tool**: Used for communication, attraction, or deterrence among species.

**Energy-efficient Illumination**: Producing light without significant energy loss.