I have a tube anemone that is about 12 inches long. I just bought him from another guy taking his tank down. He is not doing well in my tank. My starfish and crabs keep messing with him. My substraight is not deep enough for him as well I am afraid. Here is an explination of what it is.

I would like to trade it for a fish, a nice fish- or something cool. I don't have corals really. Would trade + cash for a blue hippo.

The Tube Anemone is also referred to as the Tube Dwelling Anemone, and is best kept in a reef or species-only aquarium with a soft, deep substrate. It is actually a distant relative of the true sea anemone. It creates its tube from the nematocysts that it has discharged. Their coloration is highly variable and can range from tan, pink, purple, black or even have shades of fluorescent green.
The ideal aquarium for the Tube Anemone is one with a deep sand bed, plenty of live rock and a refugium for a natural food source. They are non-photosynthetic and do not require intense lighting. In fact, they are nocturnal in nature and will take time to begin to open during the illuminated hours.
Because they are not photosynthetic, they need to be fed regularly when it is fully expanded. Feed small frozen foods such as brine or mysis shrimp, chopped pieces of fish, cyclopeeze and zooplankton