Jarak Island () is an island in the straits of Malacca. It is administered as part of Perak, Malaysia. The island is granitic, heavily forested, and has a rocky shoreline.Hussin, A. & Ghani, A. & Ismail, Khaira & Fauzi, Rosmadi & Dorall, R. & Gokilan, S.. (2008). The geology and geomorphology of Pulau Jarak, Pulau sembilan and Pulau Perak. 27. 1–6.Phang, Siew-Moi & Lim, Phaik Eem & Lean, Jillian & Ooi, Jillian & Yeong, Hui Yin & Ng, Woan-Shien & Küpper, Frithjof. (2008). Marine Algae of Perak Island, Jarak Island and the Sembilan Group of Islands in the Straits of Malacca. 27. Jarak has been described as being in size.
The island is home to an endemic species of gecko, the Jarak Island bent-toed gecko (Cyrtodactylus jarakensis).Grismer, Larry & Onn, Chan & Grismer, Jesse & Wood Jr, Perry & M. BELABUT, Daicus. (2008). Three New Species Of Cyrtodactylus (Squamata: Gekkonidae) From Peninsular Malaysia. Zootaxa. 1–23. 10.5281/zenodo.184717. The waters around the island host a number of coral reefs.
A notable, extensive survey of the island was documented by John Wyatt-Smith and Michael Tweedie in 1950, who were part of an expedition investigating scrub typhus on the island.Wyatt-Smith, J. "The Vegetation of Jarak Island, Straits of Malacca." Journal of Ecology 41, no. 2 (1953): 207–225. Accessed September 6, 2021. doi:10.2307/2257036.
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