The southwestern arched-mouth nase is listed as Critically Endangered in the Portuguese Red Book, and is covered by national and international legislation (5). Various sites at which it occurs have been designated as special areas of conservation, but still lack management measures for this species (5) (10).
As this species has only recently been described, little is known about its biology and habitat requirements, and there have not been any specific actions to conserve it. Further research into the southwestern arched-mouth nase is therefore needed, to better inform appropriate conservation measures (5).
The habitat of the southwestern arched-mouth nase also requires urgent protection, particularly the summer pools on which it depends. This species would benefit from habitat restoration, improvements to water quality, and measures to prevent water extraction during periods of drought (2) (4) (5), as well as the creation of new sheltered pools (4) (6). Some studies have already looked at the effects of habitat improvement schemes on the southwestern arched-mouth nase (11).
Further recommended conservation measures for this small endemic fish include controlling introduced species (2) (4) (5) and increasing public awareness about the conservation of aquatic habitats (5). To maintain and increase its genetic diversity, the southwestern arched-mouth nase also requires measures to reconnect its populations (5) (10). Scientists have recommended reintroducing this species into streams between Bensafrim and Arade, as well as maintaining it in artificial refuges (10).