Pulau Rawa (not to be mistaken by the one in Johor) is only accessible by snorkeling and diving boats, a 30-minute journey from either Perhentian Besar (Big Island) or Perhentian Kecil (Small Island).
There are no resorts here, hence the water clarity is probably one of the best in Perhentian. In general, snorkeling here is quite good.
The water is extremely clear and the coral growth area is fairly vast. The snorkeling area is mostly filled with brown staghorn corals, table corals and some brain corals. I also saw some colourful clams and christmas tree worms.
In general, the snorkel is pretty much similar quality to those found at Tokong Burung. As for the fish variety, I spotted various types of damselfish, red-breasted Maori wrasse, clown anemonefish, foxface rabbitfish, a few types of parrotfish, etc.
The fish here are quite friendly when you feed them. It is not uncommon to have hundreds of fish storming at you for that slice of bread you are trying to feed them.