The Leopard Sea Cucumber is a sea cucumber under the Holothuriidae family. It can be found in the Western Indian Ocean and Pacific Ocean and is distinguishable by it's sausage like appearance, leathery skin and 2 feet long length.
It's cardiovascular system (and that of most sea cucumbers)
The Leopard Sea Cucumber has a closed circulatory system. It contains a central hemel ring that is next to the ring canal of the cucumber's water vascular system. This sends off additional vessels along the radial currents. The blood in a sea cucumber's hemel system is identicle to the coelomic fluid that bathes the organs.