{{Short description|Species of fish}} {{Speciesbox | image = Elacatinus atronasum.JPG | status = EN | status_system = IUCN3.1 | status_ref = <ref name = IUCN>{{cite journal | author = Pezold, F. | author2 = van Tassell, J. | author3 = Tornabene, L. | author4 = Aiken, K.A. | author5 = Bouchereau, J.-L. | name-list-style = amp | year = 2015 | title = ''Elacatinus atronasus'' |journal = [[The IUCN Red List of Threatened Species]] | volume = 2015 | page = e.T185977A1797817 | doi = 10.2305/IUCN.UK.2015-2.RLTS.T185977A1797817.en | doi-access = free }}</ref> | taxon = Elacatinus atronasus | authority = ([[James E. Böhlke|Böhlke]] & [[C. Richard Robins|Robins]], 1968) | synonyms = *''Gobiosoma atronasum'' <small>Böhlke & Robins, 1968</small> *''Elacatinus atronasum'' <small>(Böhlke & Robins, 1968)</small> | synonyms_ref = <ref name = FishBase>{{FishBase|Elacatinus|atronasus|month=June|year=2018}}</ref> }}
'''''Elacatinus atronasus''''' is a species of [[ray-finned fish]] in the [[Family (taxonomy)|family]] [[Gobiidae]] which is [[endemism|endemic]] to a single reef in [[Exuma Sound]] in the Bahamas.<ref name = IUCN/> It is a species associated with a coral reefs but unlike many other species in the genus ''[[Elacatinus]]'' it does not engage in [[Cleaner fish|cleaning behaviour]], feeding instead on particulate [[zooplankton]]. It occurs in large, mixed groups in the vicinity of vertical faces which have plentiful holes and near undercut ledges. It forms schools above the sea floor where has been recorded as remaining stationary, hovering above corals by day, resting on the coral during the night. Its reproductive behaviour is unknown. The [[IUCN]] assess ''Elacatinus atronasus'' as [[endangered]] due to its restricted range and the perceived vulnerability of this species to predation by the [[Invasive species|invasive]] [[lionfish]], ''[[Pterois miles]]'' and ''[[Red lionfish|Pterois volitans]]''.<ref name = IUCN/>
==References== {{Reflist}}
{{Taxonbar|from = Q785108}}
[[Category:Elacatinus|atronasus]] [[Category:Fish described in 1968]]