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Members of the genus Halobates are the only insects to be found in the open oceans .generally roughly between latitudes 40°N and 40°S . Of the 40 - odd species , only five (Halobates means. H- sericeus. H. germanus. H . sobrinus and H. splendens tare pelagic > the others being found in near - shore habitats . often endemic to islands or island groups. H. means is the only cosmopolitan species, being found in the Atlantic . Pacific and Indian Oceans . All five species are found in the Pacific Ocean but only two , Halobates means and Halobates germanus. occur also in the Indian Ocean .Their ranges of distribution are probably limited by physical as well as historical factors .Halobates probably originated from a near - shore brackish - water ancestor in the Indo - Malaysian region . This is the area where the majority of the near - shore sea - skater species are found ;it is also where related brackish - water genera (Asclepios , etc . )occur . There are indications that the open - ocean H alobates are
Members of the genus Halobates are the only insects to be found in the open oceans .generally roughly between latitudes 40 ° N and 40 ° S. Of the 40 - odd species, only five (Halobates means. H-sericeus. H. germanus. H. sobrinus and H. splendens tare pelagic> the others being found in near - shore habitats. Often endemic to islands or island groups. H. means is the only cosmopolitan species, being found in the Atlantic. Pacific and Indian Oceans. All five species are found in the Pacific Ocean but only two, Halobates means and Halobates germanus. occur also in the Indian Ocean.Their ranges of distribution are probably limited by physical as well as historical factors .Halobates probably originated from a near - shore brackish - water This is the area where the majority of the near - shore sea - skater species are found; it is also where related brackish - water genera (Asclepios, etc.) occur. There are indications that the open - oce an H alobates are