About Trimusculus reticulatus (G.B.Sowerby I, 1835)
Trimusculus reticulatus (G.B.Sowerby I, 1835) is a species of small air-breathing sea snail, also called a false limpet. It is a pulmonate gastropod mollusc that belongs to the family Trimusculidae, commonly known as button snails. This species has a specific chemical defense mechanism that helps it avoid being eaten by seastars, including Pisaster ochraceus and P. giganteus. When a seastar attempts to attack Trimusculus reticulatus, the snail releases a thick, milky white mucus. This mucus disrupts the tube feet of the seastar, making it harder for the predator to grip and consume the snail. The mucus does not harm the seastar, but it slows the attack long enough for the limpet to escape danger. This defense mechanism is only effective against seastars. It does not work against other predators such as crabs, which can catch and eat this limpet without any issues. Researchers have tested the defensive properties of this mucus by coating other limpets with it, and found that seastars avoided these coated limpets just as they avoid uncoated Trimusculus reticulatus.
