Dense stands of Red Sea Whips Ellisella sp. give Susan's Reef a unique aesthetic quality that sets it apart from other Walindi reefs. Susan's is a submerged ridge, connected to a much larger reef by a saddle, which creates a channel between the reefs. A stunning collection of corals is particularly rich at the southern end of the reef where it connects to the saddle. This area is crammed with hard and soft corals and a wide range of other phyla. The more obvious invertebrates include sponges, ascidians, bryozoans and a variety of annelid worms such as fan worms and Christmas tree worms. Particularly spectacular large gorgonian fans, red sea whips and elephant ear sponges, everything adorned with colorful crinoids, delight all who dive here. Seemingly oblivious to the surrounding splendor, a multitude of fish life go about their business. In the channel between the reefs, a photogenic pair of Longfin Bannerfish will often be seen posing beside one of the many gorgonians on the reef wall or on the sandy floor. A school of Razorfish Aeoliscus strigatus live in the red sea whips at 18m near the southern corner of the reef. These fish swim head down in a bobbing manner, making them difficult to see amongst the sea whips. When danger approaches they turn their narrow body sideways making them even harder to see. The larger of the two dark red sea fans at the southern end of the saddle is a particularly good place to observe Long Nose Hawfish Oxycirrhites typus. There are a variety of Butterflyfish Chaetodontidae and Angelfish Pomacanthidae commonly seen around the reef and the Pixie Hawkfish Cirrhitichthys falco is particularly abundant here.