BéarlaMean live weight 1,200 to 1,600 g; body-wall thickness: 0.7 cm. Body cylindrical, arched dorsally (bivium) and flattened ventrally (trivium); calcareous disc of podia around 300 micrometer in diameter. Mouth ventral, surrounded by 20 small, short and yellowish tentacles. Anus nearly dorsal. Calcareous ring with large radial pieces and narrow interradials. Cuvierian tubules numerous and thick. Bivium yellow with brown band; trivium lighter; podia on bivium and trivium encircled by a characteristics brown spot. Spicules on ventral tegument with a variety of pseudo-rosettes and biscuit-like nodules; dorsal tegument with rosettes and a few rods; ventral podia with various rods; tentacles with rods, straight or slightly curved and very spiny.