Annelid (Tomopterae) - The polychaete Tomopteris is one of the only marine creatures that makes yellow luminescence. When disturbed, a flurry of glowing sparks will erupt from the parapodia (the paddle-like structures).
Giger is another artist who made excellent use of biological composites to craft horrors that chase us into our nightmares. The Xenomorphs of "Aliens" - and their nasty little face-hugging offspring - are some of his most memorable creations.
One of the reasons the alien face-huggers designed by H. Giger get such a visceral reaction from movie-goers is the way they take familiar elements from real animals and other sources and recombine them into something hideous and new.
The deep-sea shrimp (Acanthephyra purpurea) spews bioluminescence out of its mouth, like a fire-breathing dragon. The light serves to distract or temporarily blind a predator like this viper fish (Chauliodus danae).