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Hydra (/ ˈ h aɪ d r ə / HY-drə) is a genus of small freshwater hydrozoans of the phylum Cnidaria.They are native to the temperate and tropical regions. [2] [3] The genus was named by Linnaeus in 1758 after the Hydra, which was the many-headed beast of myth defeated by Heracles, as when the animal has a part severed, it will regenerate much like the mythical hydra’s heads.
Ingestion and egestion occur through the mouth. Like other hydras, Hydra vulgaris cling to a base object with a "foot" pad, shaped like a disk. The Hydra moves by releasing its grip on its base and is carried away by the current. H. vulgaris can also move by bending over, grabbing a surface with its tentacles, releasing its grip with its "foot ...
Reed boats and rafts, along with dugout canoes and other rafts, are among the oldest known types of boats. Often used as traditional fishing boats, they are still used in a few places around the world, though they have generally been replaced with planked boats. Reed boats can be distinguished from reed rafts, since reed boats are usually ...
Outboard Marine Corporation is a leading manufacturer and marketer of internationally known boat brands, including Chris-Craft(R), Four Winns(R), Seaswirl(R), Javelin(R), Stratos(R), Lowe(R), Hydra-Sports(R) and Princecraft; marine accessories and marine engines, under the brand names of Johnson(R) and Evinrude(R); and Ficht Ram Injection(R ...
Hydra (boat) Hydra. (boat) The Hydra is a 22-person hydrogen boat, power-assisted by an electric motor that gets its electricity from a fuel cell. [1] Its debut was in June 2000 on the Rhine near Bonn, Germany. The idea for this project came from Christian Machens in 1999 for designing and building the fuel cell system for the Hydra in Leipzig .
Outrigger boat. Samudra Raksa ship, a replica of Javanese 8th century double outrigger vessel depicted in Borobudur bas relief. From 2003 to 2004 it sailed from Indonesia to Madagascar and to Ghana. Outrigger boats are various watercraft featuring one or more lateral support floats known as outriggers, which are fastened to one or both sides of ...
A hydroplane (or hydro, or thunderboat) is a fast motorboat, where the hull shape is such that at speed, the weight of the boat is supported by planing forces, rather than simple buoyancy. A key aspect of hydroplanes is that they use the water they are on for lift rather than buoyancy, as well as for propulsion and steering: when travelling at ...
The boat skippered by Olympic great Ben Ainslie then dealt Italy's Luna Rossa Prada Pirelli its first loss in competitive racing in the opening round robin. American and British boats into America ...
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