(just because my name states that im a noob at reefkeeping doesnt really mean it, i ran out of usernames)if you choose a brittle choose the leopard looking serpent starfish, plus a harmless invertebrate would be a flame scallop. keep this in mind, the smoother the starfish appears its probably gonna be reef safe. if its rough looking or full of thorns it's most likely gonna eat corals or anything it can catch( including scallops, sea cucumbers, etc. ) DON'T buy a mantis shrimp! it will eat everything it can get, ( almost anything ) even crustaceans, if your tank is covered in algae, then the linckia is a great choice, dont buy conch's, if your fish keep dying, you should buy a serpent starfish, they are great scavengers and are the least predatory of the brittles. it will hide under rocks and will go "fishing" for any food that floats by. flame scallops need lots of plankton (just like feather duster worms) and can place it almost any where. if you place it on the sandbed it will most likely move to a new spot. if you have a large tank, a sea apple is a beautiful animal that you can keep, it's a filter feeder and may eat any frozen shrimp. it likes being in the current because it can receive the most amount of food, but if gets too stressed, it can release dangerous toxins that can kill your whole tank( i learned from experience ). a nudibranch feeds on corals( mostly sponges ) so not a good choice. i haven't had a clam or oyster yet, but don't get them while your still a new aquarium owner. most lobsters are good while they're under 5 inches. if a hermit crab is really big, then they will eat or attack your corals and slow moving animals. :question:any questions?
