On Sentosa Island, there is a Fish Reflexology Spa.
Pools are filled with 2 different types of Doctor Fish, which bite at your feet and consume dead skin. This is known as the 'nibbling massage'. Then follows a reflexology massage by humans.

Beginners Pool with small fish.

Advanced Pool with bigger fish.

You must cover-up any cuts with a plaster so that the fish will not attack too hard.

At the beginning the experience feels very strange - the fish start very quickly and swarm over you feet and lower legs. The sensation feels somewhere between tickling and short electric shocks, and as time goes on, the shocks become harder. By the end, your feet will be very smooth and relaxed.