Blue Sea Star - mostly these are a dark blue as this one but some variations have been noted as being light blue, purple and even orange. It inhabits the tropical waters of the Indian and Pacific oceans. If attacked it can self-sever a limb to escape which it then starts to regenerate. I came across this colourful starfish when visiting Elliot Island in the great barrier reef of Queensland Australia. Here it can be observed in shallow waters. It is extremely sensitive to changes in temperature and oxygen levels. Due to this it has a high mortality rate in captivity. So best left where they are I say.