Halosaurus johnsonianus, also called the Sahara halosaur, is a deep-sea fish in the family Halosauridae. It is found in the eastern Atlantic Ocean from southern Spain and Portugal to Mauritania, including the Azores and Canary Islands. It is a benthopelagic species living on the continental slope in depths from 800 to 2,200 m (2,600 to 7,200 ft). It grows to 50 cm (20 in) total length.
Eucalyptus johnsoniana, commonly known as Johnson's mallee, is a species of mallee that is endemic to Western Australia. It has smooth, greyish brown bark, sometimes with flaky to fibrous brownish bark at the base, lance-shaped adult leaves, flower buds in groups of seven, creamy white flowers and shortened spherical fruit with an unusually small opening.
Johnsonina eriomma is a species of spikefish found in the Caribbean Sea in the waters around Cuba and Trinidad and Tobago. It occurs at depths of from 183 to 549 metres (600 to 1,801 ft). This species is the only known member of its genus.