About Clavelina robusta Kott, 1990
Clavelina robusta Kott, 1990 is a species that frequently forms dense clusters. Its individual zooids are large, cylindrical structures measuring 2–4 cm. The overall colour of this species ranges from black to dark blue to gray, and each individual zooid has fluorescent green, yellow, or white rings surrounding both of its siphons. The external covering of this species has a firm basal matrix, and is slightly transparent and soft in texture. Clavelina robusta occurs in the Western Pacific, and can be found in Australia, Indonesia, the Philippines, Japan, and the Solomon Islands, where it often grows in large colonies.
