Toward the end of the dive, I turn a rock over and find a large slug-like creature. It is deep purple, with a frilly orange and lilac border, which it waves vigorously. I sign bunny ears at Cobb.

His team, however, were amazed to find that while they were not effective against the frogs, they did kill slugs and snails. To test the effectiveness of caffeine solutions against large slugs ...

Large groups of slugs have been known to destroy whole beds of young seedlings overnight or severely damage mature plants. Their alarming reproductive capacity only exacerbates the issue ...