Reidak is a character in the BIONICLE storyline. He belonged to the Skakdi species, and was a member of the Dark Hunters before becoming a Piraka. Like the rest of the Piraka, he fought the Toa Inika for the Mask of Life, but was mutated into a sea snake upon contact with Mahri Nui's mutagen when they went into the sea-city. He was later captured by the Order of Mata Nui and escaped, but was forced to fuse with the other Piraka to form a gold-skinned being. This probably killed him.
Reidak has made various appearances in sets, and so may refer to: