Although the name suggests it, there are no sardines here but it is one of the busiest dive sites in Raja Ampat. This dive site is found in the eastern parts of Kri Island in Raja Ampat. The name arises from the density of fish on the reef; there are so many that it is similar to the size of schools of sardines. There are thousands of fish here and it is definitely an action packed site. The large numbers of fish draw in sharks and divers can watch them hunt amongst the many fish.
The depths of the dive site range from 5 metres to 30 metres and there is a large pinnacle that is about 200 metres long. The reef starts at 5 metres and then slopes down to the ocean floor. The site is loved by photographers as the numbers of fish make for great wide-angle photos. The currents can become very strong and so it normal for divers to have advanced experience before they dive here. Along with the fish, there are many large gorgonian fans and amongst those divers can spot three species of pygmy seahorse.
Divers can expect to see bannerfish, sweetlips, tuna, rainbow runners, jacks, trevally, surgeonfish, and fusiliers in large numbers. There are schools of large bump head parrotfish, black tip reef sharks, white tip reef sharks and grey reef sharks. The numbers are so large that divers can hear a phenomenon known as fish thunder. This is the noise created from the rapid movement of fish in large numbers as they are preyed upon. The noise comes from the pressure on the liquid water that is created by the moving fish. This happens more frequently when sharks are attacking the schools of fish, which is a common site in this area.