Soft corals are another broad group of corals which are only loosely related. Some of these species are well suited for the average reef aquarium but others are still difficult to keep and grow. They are commonly called leather, toadstool, devil's hand, young and colt coral.

Soft corals come in a range of shapes but they all lack a solid supporting skeleton. Most colonies are supported by a thick central stalk which culminates into branches, fingers or a cap. Soft corals can expand and contract the colony and polyps which greatly alters the appearance of the coral. Some species can grow quite tall and broad while other species might stay short and prefer to spread laterally.

Although soft corals can be really hardy, this often leads to neglect of their specific care requirements. Most species require abundant water movement around the colony, whether it is fast or slow flow speeds. Tall graceful colonies tend to be suited for moderate flow speeds and moderate lighting intensities. Short, thick or stubby colonies tend to be better suited for intermediate to high flow speeds and intermediate lighting intensities. Many species grow faster in high nutrient water.

Soft coral cuttings should be made with a sharp tool to prevent tearing tissue. Re-attachment is usually done by gently tying the cutting to a substrate or skewering it with a toothpick until the fragment attaches.