In Arabic folklore, a Marid (Arabic: مارد) is a jinn associated with open waters of the seas and oceans where it finds sanctuary.
Powers
Marids are often described as the most powerful type of djinn, having especially great powers. They are the most arrogant and proud as well. Like every djinn, they have free will yet could be compelled to perform chores. They also have the ability to grant wishes to mortals, but that usually requires battle, and according to some sources imprisonment, rituals, or just a great deal of flattery.
Reference
Marids are mentioned in the Qur'an (in Sura As-Saaffat:7 (37:7): And to guard against every rebellious devil (Marid)., as well as pre-Islamic Arabian mythology and throughout Asia.