This jellyfish is a beautiful comb jelly with a striking red coloration with a special purpose.
The bloodybelly preys on deep-sea bioluminescent animals that, once swallowed, would usually make the animal glow and be vulnerable to its own predators. Deep underwater red appears as black, and so by making its stomach a deep red color, the bloody belly manages to block the bioluminescence and keep itself hidden.
Bloodybelly comb jellies don′t have tentacles. Instead, it moves by beating eight rows of cilia hairs that run along its body. As it swims, the cilia themselves give off an impressive light show which it may use selectively to attract food.