sea cucumber a salt water fish? Ive just brought about 12 fish fish for a 30 gallon tank and there all salt water, i brought them all off off eBay, and sea cumbers and star fish i actually have 2 questions, is a starfish and sea cucumber a salt water inhabiter, and whats the best salt water brand that is cheap that can fill my tank? please yahoo people i need answers !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!