How Do Muscle Farms Work?

If you hold a snail in your hand and hum at it, eventually it'll come out of its shell. Zach says the size of a shell depends on the type or species of muscles but it also depends on the age of the muscle as the animals get older their shells get bigger. Scientists believe is that the muscles can smell their predators they are called pheromones They are chemicals in the water just like how we smell by chemicals in the air.