I really like sea stars and i want urchins even more but i cant have them
I will soon have a tank between 30-40 gallons, with a 10 gallon chaeto sump. The display will be decorated will soft corals, shooms, polyps, and a feather duster or two when it matures. I want peaceful fish and clean up crew.
Can somebody reccomended a weird/whacky/odd/cool invert for this setup? I obviously dont want anything that will wreck the tank and its inhabitants, and nothing overly hard to keep.

Can somebody reccomended a weird/whacky/odd/cool invert for this setup? I obviously dont want anything that will wreck the tank and its inhabitants, and nothing overly hard to keep.