👉 Costalimacris is a species of sea snail, commonly known as the starfish, that belongs to the family Echinodonta. They are primarily found in tropical and subtropical waters around the world, including the Indian Ocean, Atlantic Ocean, Pacific Ocean, and Indian and Pacific Oceans. Costalimacris have an elongated shell with a thick, bony exterior covering their body, which they use for both protection and shelter from predators.