This is one of the most gloriously absurd things I've ever seen! It's Metallogorgia melanotrichos, a deep sea Gorgonian coral that puts all its pretty polyps at the end of a long stalk. They reach about 1 metre (3.3 feet) in total height.
I think it's fabulous! We now have a weird pink palm tree to go with our weird pink trees, mushrooms and cacti. I knew it was weird down there but I had no idea it was so floral!