This snorkeling spot is located to the left side of Pantai Pasir Panjang. A few metres of swimming is required from the sandy shoreline before you see the first marine life.
The highlight of snorkeling here definitely goes to the juvenile black-tip reef sharks (Carcharinus melanopterus) which you easily spot roaming some distance away. Since I know these sharks will almost never attack humans, I usually end up chasing them to get the best photo shots.
Other than that, the corals at Tanjung Tengah are fairly healthy. Nonetheless, there are patches of coral rubbles strewn on the sandy floor probably due to inconsiderate snorkelers trampling on them. The combination of hard corals such as green staghorn and pink Acropora sp. are particularly beautiful. Apart from that, you can also see table corals and sea anemones here.
As for the fish variety, I saw Indo-Pacific sergeant, gold-saddle rabbitfish, various specie of damselfish, moon wrasse, two-lined spinecheek, swarthy parrotfish (Scarus niger), slender needlefish (Platybelone argalus, often mistaken with either swordfish or barracuda), yellow-margin triggerfish (Pseudobalistes flavimarginatus), etc.
Overall, the snorkeling here is highly recommended especially due to its easy access from the many resorts on Pantai Pasir Panjang.