Clavelina robusta,Sea Squirt , Stalked Ascidian, Cat Eye Squirt

Chinese name: 海鞘

This species frequently occurs in dense clusters. It has large 2–4 cm cylindrical zooids. They generally range from black to dark blue to gray in colour, with individual zooids having fluorescent green, yellow, or white rings around both siphons. The external cover has a firm basal matrix, and is somewhat transparent and soft.