The Rock Pool Project in Plymouth says the non-native sea hare looks "alien-like".

Slugs are slow, and this makes them easy targets for predators however big or small they might be. Here, we see that a slug has been spotted by a hungry colony of driver ants, and the slug is ...

Consider the lowly slug. When I was a child of about five or six, I apparently did. My grandmother was busy with a sharp garden tool killing slugs that were rampaging through her strawberry patch.