spiny sea cucumber

I am a beginner to saltwater aquariums and I like the look of the spiny sea cucumber (Pentacta anceps). I have some questions about it. 1. Are they easy to keep? I have read that they are easy - moderate but liveaquaria lists them as expert only. 2. I know they are filter feeders but what are...

Hi everyone! I went to my LFS yesterday to pick up some more inverts for my aquarium, specifically sand sifting inverts since my sand bed is thickish and gets dirty. I picked up 3 nassarius vibex snails and a sea cucumber. The sea cucumber I picked up was a pink spiny sea cucumber. I know...