Lychnorhiza arubae is a species of true jellyfish within the genus Lychnorhiza. It has been found in waters surrounding the Malay Archipelago.
Lychnorhiza arubae is around 23 centimetres in width. Eight pointed, velar lappets are present in each octant. The arm-disk has short filaments. The oral arms are as long as the radius of the bell disk, and are widely separated from each other. They have a few short filaments. There are two centripetal canals in between adjacent radial canals; rhopalar radial canals are broad, while inter-rhopalar ones are more narrow.[1]