how many people you want on the boat. You can even charter the entire taxi so that its just you on the boat and nobody else. An important thing to keep in mind when deciding to go somewhere isolated like Molos or the Peloponnese Beach, you should arrange a time for the boat to pick you up at these locations. These locations do not have telephones so you will not be able to call the taxis to tell them what time to pick you up. When you stay at hotels or other places at Kamini, Vlichos or Mandraki, you will have to take a water taxi to move around.
A water taxi is actually a small motorboat. They can be found on the east side of the harbor. You will find them next to the flying dolphins, cats and catamarans. You can hire them to go to the different parts along the coast of Hydra, to the mainland or to the nearby islands. On the east side of the harbor, there is a phone that you can use for free if there are no water taxis available at that moment.
All water taxis are supposed to have the same fare and it is displayed inside the boat. The fare is based on the number of people on the boat and it is based on one journey. You need to watch out for drivers who want to charge double for more than one group on board.
Water taxis are one of few modes of public transportation on the island of Hydra. If you want a more interesting mode of transport, you could try and take a donkey. You can use the water taxis to enjoy the clean, clear water that is found around Hydra island as there are no major industries in Hydra to pollute the waters. You can watch the fishers organize their nets as they fish. You can even charter the water taxis to take you on a tour around the island.