[1] Dugongs and seahorses, which feed on seagrass, make their home in the nearby coral reefs.

Environmentalists are concerned that the development of Port of Tanjung Pelepas is threatening the area and the livelihood of seahorses as well as dugongs and turtles.

The island is planned to be gazette as a nature park with various environmental based NGOs funding it.

[2] In the aftermath of the International Court of Justice (ICJ) ruling that saw Pedra Branca being awarded to Singapore, concerns on Malaysian sovereignty over Pulau Merambong have been raised.

On 13 April 2007, two Interceptor Crafts of the Special Task Squadron of Singapore's Police Coast Guard (PCG) were on ambush duty off Tuas in the vicinity of Tuas Jetty, when a speedboat with six illegal immigrants and cartons of cigarettes intruded into Singapore's territorial waters at about 9:30 pm from the direction of Malaysia.