The Royal Starfish is a starfish under the Astropectinidae family. It lives in depths up to a depth of 700 feet, but commonly lives around 70-100 feet. It can be found on the eastern and southeastern coasts of the United States.
It's Cardiovascular system (and that of most starfish)
The Royal Starfish relies on a hemel system for internal circulation. The hemel system consists of 3 rings, one around the mouth, digestive system, and aboral surface. The heart is located at the apex of the three rings. At the base of each arm are paired gonads which are bypassed by a lateral blood vessel that extends from the ring around the aboral surface to the tip of each of the starfish's arms.