Halosaurus attenuatus Garman, 1899 .

To 40.6 cm (16 in) TL (Froese and Pauly 2019; note that we were unable to verify this record). Probably circumglobal (Smith in Carpenter and De Angelis 2016); Southern Baja California (Cruz-Acevedo et al. 2018) to Gulf of California to Panama (Robertson et al. 2017); Islas Galápagos; eastern Atlantic (Robertson et al. 2017). Depth: 1,113 –2,500 m (3,651 –8,200 ft) (Robertson et al. 2017).