pujan , first and foremost welcome to the site, as to your question yes there is a way to keep only corals , we had an old old member here a lonbg time ago thats what he had , since he is no longer a member its gonna be hard for me to find(or remeber) the name ill try so you can read his thread , very interesting and smart guy
maybe biff or yote or someone else may remeber his name , it was that guy form alaska , idk if yall remember , if i recall correctly he used to say fish were filthy and he only maintained Coral only tanks