Roboastra tentaculata

In order for phylogenetic integrity, Roboastra tentaculata was moved into Roboastra from the genus Tambja.^[5][6]

The bulk of the sea slug body is green, along with bright yellow or orange stripes outlined with brown.^[3][7] Two green rhinophores with lamellae and rhinophoral cases are noticeable.^[3] This sea slug has green gills of two different sizes.^[3] Bright green oral tentacles are also found on the back of the organism, opposite of a straight green foot located on the bottom.^[3] Also present is a radula with smooth and large teeth.^[3] The digestive system is composed of salivary glands, an esophagus and an oral tube.^[3] R. tentaculata also have three reproductive duct structures; a hermaphroditic, vaginal and uterine duct.^[3] The first duct is hermaphroditic with an ampulla, vas deferens and a spiked penis.^[3] The second tract is composed of a small vaginal tube and a bursa copulatrix.^[3] The third duct contains a uterine tube and one oviduct.^[3]