Mushroom corals are easy for beginners to take care of. They come in many colours and grow quickly. Be careful not to crowd other corals, and give them space to grow.
Small poly, colony polyps, are sold as clusters on rocks or plugs. They are easy to grow, come in many colors, and some of them are luminescent and glow under blue LEDs. Can sting, so give them room!
Starburst and Green Star Polyps grow in groups and have tentacles that can't be broken. This makes them hard to get rid of but easy to grow.
Anthelia (Thin Waving Hand Coral) and Xenia (Thick Waving Hand Coral) need similar conditions and have different-colored tendrils that wave. Anthelia is thicker than Xenia.
Pineapple Corals are easy for beginners to take care of and do well in many different tank conditions. They look more like a small, thick tree than a pineapple. Grows in captivity and gives your room more height.
Colt corals, which are also called "finger leather corals," have bodies that are light tan and brown polyps with thin fingers. They must have room to move around.
Toadstool Mushroom Corals come in a lot of different colours. Small polyps on the base plate and thick stalk. Some make poisons, so give them room.