The spew bioluminescence of the shrimp Parapandalus sp.
An amazing picture of a deep-sea shrimp belonging to the genus Parapandalus (Decapoda - Pandalidae) -[Syn. Plesionika]-, hurling a blue glowing cloud of organic matter.
This amazing picture was taken during a Deep Light cruise to Bahamas in 2009, to study bioluminescence and vision in deep-sea benthic animals. You can read here the research article.
These shrimps occur in virtually all tropical and subtropical waters and in some temperate seas, but most species of the genus can be found in the Indo-West Pacific.
References:  - 
Photo credit: ©Johnsen Lab | Locality: Bahamas (2009)