Most Seastars rely on their good looks to get people to like them. They certainly can't rely on their table manners. Rather than having to chew, starfish prefer to regurgitate their entire stomach on their food and wait for it to dissolve in the acid. It's not pleasant, but it is amazing what you can get away with when you're good looking.
It will probably come as no surprise that Tube Anemones, like Tube Worms, like to live in a tubes. They can disappear down these tubes to protect themselves against predators.
Most marine life starts off as plankton, drifting in the current looking for a nice place to settle. But it seems that everyone wants to eat them before they even get there. That includes the 'flowers of the sea'- Anemones.
Zoanthids are colonies of anemones all living and working together. They were here long before Captain Cook arrived in Sydney and Australia became one of the British colonies.