Follow that trail of slime to an amazing creature. It walks on one foot, perches two eyes way over its head, and has a saddle (but is never ridden)…
It’s a slug!
That “saddle”, by the way, is actually a mantle. In snails, the mantle secretes the shell. While shells are good protection, they require lots of energy and resources to make. Slug ancestors once had shells, but some were successful when they made smaller and smaller shells. Today, slugs are shell-less (actually, some slugs today still have very reduced shells or internal shells). They’re living a more dangerous life, but can eat a bigger variety of food and use less energy.
How many slugs can you find in the picture above?