Classification / Names
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Lophiiformes (Anglerfishes) >
Tetrabrachiidae (Four-armed frogfishes)
Etymology: Dibrachichthys: Name from Greek 'di' meaning two; 'brachion' for arm; and 'ichthys' for fish, in allusion to the two pectoral fins, one on each side, in contrast to the ‘‘double’’ pectoral fin (two on each side) of its sister genus Tetrabrachium; melanurus: Name derived from the Greek 'melanos' for black and 'oura' for tail, referring to the conspicuous black bar across the base of the caudal fin.
Environment: milieu / climate zone / depth range / distribution range
Ecologia
marino; distribuzione batimetrica 6 - 146 m (Ref. 82431). Tropical
Distribuzione
Stati | Aree FAO | Ecosystems | Presenze | Point map | Introduzioni | Faunafri
Eastern Indian Ocean to Western Pacific: Australia and Indonesia.
Size / Peso / Age
Maturity: Lm ? range ? - ? cm
Max length : 5.7 cm SL maschio/sesso non determinato; (Ref. 82431); 5.6 cm SL (female)
Short description
Chiavi di identificazione | Morfologia | Morfometria
Raggi dorsali molli (totale) : 14 - 15; Raggi anali molli: 8 - 10; Vertebre: 21. This species is distinguished by the following characters: pectoral fin entire rather than the rays divided into two distinct sections; considerably broader cranium, with more extensive lateral projections of the lateral ethmoids, sphenotics, and pterotics; frontals highly elevated, each with a prominent medial flange closely approaching its counterpart on the midline (forming a longitudinal, semi-closed, tube-like structure on the snout between the eyes), and a large anterolateral surface, forming (together with the respective sphenotic and lateral ethmoid) a deep, semi-circular, protective cavity for the eye; parietals conical and highly elevated, resulting in formation of a deep, central, cranial depression; vertebrae 21; posteriormost proximal radial of the dorsal and anal fins lying between the neural and haemal spines, respectively, of the fifth and sixth pre-ural centra; second and third dorsal-fin spines well developed; dorsal-fin rays 14-15; anal-fin rays 8-10; distal end of the third pectoral-fin radial relatively small; considerably longer pectoral-fin rays with longest ray 34.5-48.5%; pelvic bone and fin hypertrophied; an entirely different pigment pattern; oral cavity darkly pigmented; a conspicuous dark band on the dorsum just below the soft dorsal fin, a dark bar across the caudal peduncle and base of the tail, no ocelli-like spots (Ref. 82431).
Specimens collected by epibenthic sled, dredge, otter trawl or prawn trawl over soft-bottom substrates of mud or sand. Apparently rare, with solitary individuals widely dispersed. (Ref. 82431).
Life cycle and mating behavior
Maturità | Riproduzione | Deposizione | Uova | Fecundity | Larve
Pietsch, T.W., J.W. Johnson and R.J. Arnold, 2009. A new genus and species of the shallow-water anglerfish family Tetrabrachiidae (Teleostei: Lophiiformes: Antennarioidei) from Australia and Indonesia. Copeia 2009(3):483-493. (Ref. 82431)
IUCN Red List Status (Ref. 130435: Version 2024-2)
Threat to humans
Harmless
Human uses
Strumenti
Special reports
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Estimates based on models
Preferred temperature (Ref.
123201): 23.3 - 28.3, mean 27 °C (based on 331 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.2500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01995 (0.00906 - 0.04395), b=3.01 (2.83 - 3.19), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.5 ±0.6 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
