Atoll coralbrotula (Diancistrus atollorum), first described by Schwarzhans, Møller & Nielsen, 2005 is a small fish in the family Dinematichthyidae (order Ophidiiformes). Adults typically reach 5.80 cm in maximum length. It inhabits marine coastal and open-ocean environments. Recorded depth range: 1 to 4 metres. It occurs in Tropical waters. It feeds on a mix of small fish and invertebrates as a mid-level predator. On the IUCN Red List, it is classified as Least Concern.
Dorsal soft rays (total): 72 - 76; Anal soft rays: 56 - 61; Vertebrae: 40 - 42. Diagnosis: Vertebrae 11+29–31=40–42, dorsal fin rays 72–76; anal fin rays 56–61; eyes small (about 2.0% SL); outer pseudoclasper deep, ear-lobe shaped, opened towards ventral; inner pseudoclasper firmly joined to outer pseudoclasper anteriorly, with supporter, forming a sharp, forward-inclined lobe; narrow scale patch on cheek, no scales on operculum; head profile slender; otolith length to height ratio >2.1 .: elongated.
Behavioural data for Atoll coralbrotula is currently being reviewed.
Marine; reef-associated; depth range 1 - 4 m . Tropical Central Pacific: Micronesian atolls, eastwards to Kiribati.
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