I have a Halloween urchin that has been in my 30 gallon for about 3 months and he has done his job so now I would like for him to go to a bigger tank. He is an amazing urchin, great colors and mows algae like nobody's business. I would love to keep him but my tank just isn't big enough. I would to get $40 or trade him for some corals or equipment. Let me know what you have and I'm always open to offers. Thanks for looking.