Buy sea fans, Gorgonians, and saltwater sponges for sale for a great addition to a reef aquarium.  

Sea Fans are similar to soft corals but they anchor themselves in mud or sand instead of attaching themselves to hard substrates. Most Sea Fans only extending their polyps during the nighttime hours. Seafans eat plankton and require strong currents to carry food to them.  

 Sponges filter tons of water every day, feeding on micro plankton.  Sponges need to be attached to rock work as they do not tolerate being attached to sandy surfaces.  Sponges require strong current and excellent water quality.  They must Never be exposed to air and are best left to expert reef aquarist.