Seeking guidance about adding a sea star to my tank!

Hello, I am new to this forum so my apologies if this isn't the proper location for this question.

I have a 16gal tank with some live rock and frags I added a couple weeks ago. I have 2 clown fish and a small crab. It's been set up for 3 years. I want to add a sea star but I've been having trouble finding recourses to find out what could be compatible.

Any thoughts, suggestions, or referral to other recourses would be appreciated!