Many gastropods (including snails, slugs, molluscs and squid) are carnivorous, and prey on other gastropods. read more
The holes that you see in sea shells are where carnivorous sea snails have actually bored through the shells of their prey species to eat their victims. Snails have an organ called a radula - a bit like a toothed tongue - which they use like a rasp to scrape or cut up their food. read more
November 7, 2008 by Beach Chair Scientist 8 Comments The shell to the right with a hole through it was hinged to another shell of equal size with an animal living inside (in this case, a clam). read more
Well, if it is what you think is the reason then you are wrong. The holes that you can see in an abalone shell are intended for reproduction and breathing. Its most frightening predator is the starfish as it suffocates abalone shells through putting its tentacles over its hole where they breathe. read more