yeah some do. Definately NOT as common as freshwater. Here are some fish that do breed in captivity...Dicordipinna griessingeri, Choerodon fasciatus, Plectranthias sp., Siganus magnifica, Chaetodon mitratusem, Pomacentrus smithi, and Centropyge eibli. There's others but I'm at work and its the best i can do. If your dead set on it get a pair of Cardnials. Its not only filtration issues when most reef fish spawn, their yougn are plankton like free swimmers and would be impossible to care for in a tiny aquarium. Alot of research is being done on this now. There are a couple of books out on Captive SWF breeding.