The harbour is connected to Double Haven and the bigger sea of Mirs Bay.
[1] Islands of Crooked Harbour include: Wave-cut "benches" of 6 to 10 meters wide form along the sediment layers at Crooked Harbor and Ping Chau, which are uncommon elsewhere in Hong Kong's coastline.
[2] Eelgrasses discovered at Lai Chi Wo in 1977 were granted protection by the Agricultural and Fisheries Department of the Hong Kong government.
Periclimenes demani, a small species of shrimp, resides in this grass.
[2]: 250 On 8 June 1857, a British naval frigate encountered pirates at Crooked Harbor, 70 men leapt overboard and were massacred on land.