Limpets
Limpets eat only at night because then they are much safer moving around. Limpets eat algae off rocks using their radula. Limpets always go back to the same place after eating. Sometimes they use the same spot for their whole life. Limpets fit back into their place in the rock perfectly. Limpets can find their way back to their rock home. They leave a trail of mucus, (just like snails) behind them, which chemically “stores” their direction of travel. They use sensitive chemoreceptors to find their way back “reading” the trail. Limpets don’t even have any eyes.
(Source: library.thinkquest.org)
