The Hydrofoil (aka Flying Dolphin)

The hydrofoil is like a bus on skis but takes roughly the same amount of time as the Catamaran and also leaves Kos at about the same time as the Catamaran - taking roughly the same amount of time as the rest, as well. You cannot take cars or scooters on hydrofoils unlike the ferries or catamarans.

Click on the image to take you to a website - although I'm not sure how good this link is it's the only one I can find!