I am found in the sea and on land but I do not walk or swim. I travel by foot but I am toeless. No matter where I go, I'm never far from home. What am I?

Why this works

This riddle cleverly plays with the characteristics of a snail. The phrase "found in the sea and on land" refers to the fact that some snails live in both environments. The "travel by foot" part is a pun, as snails move using their muscular foot, but they are "toeless" because they don’t have toes like animals that walk on land. Finally, "never far from home" alludes to the snail’s shell, which serves as its home and is always carried along wherever it goes. Together, these clues lead us to the delightful answer: a snail!