While the sack-shaped scenic area extends out 500 meters from the high-tide line, the whole of Tapeng Bay covers an area of about 532 hectares and ranges in depth from five to six meters. The racks of oyster trays and "Oyster Island," as the pile of discarded oyster shells at the center of the bay is known locally, testify to the lagoon's suitability for oyster farming.
海岸高潮線起向外延伸五百公尺海域，是一處囊狀潟湖的景觀。面積共有五百三十二公頃的大鵬灣域，平均水深五到六公尺不等，養蚵棚架沿灣林立，拋棄的蚵殼還在水面中央堆成了一座「蚵殼島」。