Opaka Rocks (Bulgarian: скали Опака, ‘Skali Opaka’ ska-'li 'o-pa-ka) are a group of rocks with the principal one situated 700 m (766 yd) north of Henfield Rock, 3.44 km (2.14 mi) east of Pordim Islands and 4.79 km west by south of Mellona Rocks off the north coast of Robert Island, South Shetland Islands.