Hydromyles globulosus
Hydromyles globulosus is the only species of sea slug in the family Hydromylidae. It is commonly found in the Indo-Pacific Ocean. The species is  pelagic, carnivorous and viviparous. They are unique among sea angels in that they brood their young. Their young develop within the body of their mother, and emerge as juveniles. They are capable of producing an ink-like substance, which the release if disturbed. Appearance 
H. globulosus has an unusual appearance; it has a distinct head an trunk and very long tentacles. H. globulosus is bright orange or yellow in colour. Besides tentacles, it has two "wings". Distribution and ecology 
H. globulosus is found in the eastern Indo-Pacific Ocean, but its range is strongly influenced by currents. It is frequently found in large numbers. In popular culture 
The species was featured in the 2009 video game Endless Ocean 2. External links 

 Media (includes distribution map) - Pelagic Molluscs 2.0

References 

Euopisthobranchia
Molluscs of the Indian Ocean
Molluscs of the Pacific Ocean