Glowworm!
This glowworm is in the genus Phengodes, and is displaying one of the interesting adaptations they possess. Unlike most bioluminescent animals, the glow here is not to attract a mate but rather acts as an aposematic signal. Also, they are one of the only (potentially the only organism whose luminescence is red. not pictured here of course).
The larvae and females are voracious predators- larvae feed on millipedes and they have yet another interesting adaptation here as well!
Many millipede species have toxic compounds known as benzoquinones that they use to ward off predation- but the predatory glowworm uses its sickle-shaped, hollow mandibles to pierce the body of the millipede and inject gastric fluid. This quickly paralyzes and kills the millipede from the inside out before the millipede can release its toxic chemicals. The glowworm can then slurp up the liquefied millipede guts free from harm.
Gross, awesome, and beautiful. Pretty much describes nature.