The softened shell is then slowly scraped off by the The shell with a weak acid secreted by a special gland on the underside To bore a hole through the victim's shell, a drilling snail softens On the rocks are predatory molluscs that bore into other shelled creatures, The surface as they move along the surface. Spines on their shells usually move by holding their shells above Drills usually have thick shellsĪnd a thick operculum made of a horn-like material. Species on our shores are Rock-shell ( Thais sp.), Drupes ( Morula sp.) and Murex ( Chicoreus sp.). Predator on our rocky shores! Drills are commonly seen on bouldersĪnd rocks, including man-made structures such as breakwaters and jettyįeatures: They range from small shells to some that can be as big as your hand! Among the common drill Where seen? You will almost be certain to meet this ferocious Lay large collections of egg capsules on the rocks. It takes them a long time to get at their prey. They are fierce predators! Some can bore a hole through
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