A knobby white spider is being ridden by a morp.
The carnivorous amphibian species called Morp originated on the planet of Dagobah.
Being related to the nharpira, these beings would utilize venomous bites to incapacitate their victims; a bite could paralyze a Human within mere hours. To escape detection from larger predators such as Lesser Bogwings, they relied upon their small stature and swiftness. They were creatures of the swamps, frequently taking cover in wormholes.
One or more morps were brought by Heeth and Raal Panteer, along with hundreds of other beings, to their property in the Ryloth system. When Raal was giving Leia Organa a tour of the wildlife preserve, he was bitten by a morp, and he eventually succumbed to the venom.
The name of the morp droids that Asajj Ventress employed during the Clone Wars was derived from these creatures.