Remora's necklace is a reward from the Song from the Depths quest, given to the player by The Raptor after escaping from inside the Queen Black Dragon. It teleports you to the White Knights Encampment (near the entrance to the Grotworm lair) once a day. If destroyed, it can be retrieved from Sir Rebrum near the lair. It is recommended that you use the Port Sarim home teleport instead of using this necklace to get to the encampment, because the Port Sarim teleport does not run out of charges after one use every day, and does not require you make room for an extra inventory space to use.
After the initial update, a glitch on the Grand Exchange showed the option to buy Remora's cutscene necklace. Under item information, it stated that the item is "wielded in the right hand", and was usable in free-to-play even though it was a members-only quest item. This item had a guide price of 6 coins, from its initial price of 1 coin. In the Grand Exchange Database, there was even a graph which showed its price change trend. This was fixed with the next update.