Teluk Mahkota (also known by its former name Jason's Bay or JB[1]) is a bay and tourism attraction in Sedili, Kota Tinggi District, Johor, Malaysia.
[2] It faces the South China Sea and has a width of approximately 12 km.
The bay is situated about 28 km northeast of the town of Kota Tinggi.
At the southern end of the bay is the mouth of the smaller Sungai Sedili Kechil river and the village of Kampung Sedili Kechil.
The word "teluk" is the geographical term for bay in the Malay language.