These sea snails live at the low-tide level, at the outer side of sandspits.[4]
Description
Shells of Oliva incrassata can reach a length of 32โ95 millimetres (1.3โ3.7 in).[3] These relatively large shells are almost cylindrical, very thick, ovate, angularly swollen in the middle, with a rather short spire, a narrow and long aperture and usually with uniformly colored body whorls, except in the colummellar area. The basic color background may vary from ash-white or greyish to light yellow and brown, mottled with gray and olive, with angled transverse dark chestnut streaks and a fleshy rosy pink columellar area.[4][5]
Biology
The Giant Olives are active predators. At night they search for food, while during the day they bury themselves beneath the sand and mud.
Sowerby G. B. [first of the name] (1825). A catalogue of the shells contained in the collection of the late Earl of Tankerville. London, privately published : VII + 92 + XXXIV pp.
Tursch B., Duchamps R. & Greifeneder D. - Studies on Olividae, XX. The pre-Lamarckian names for Oliva species. APEX 9 (2/3) 51โ78, July, 1994
Zeigler R.F. & Porreca H.C. - Olive Shells of the World. Rochester Polychrome Press, N.Y. 1969.