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Teleostei (teleosts) > Atheriniformes (Silversides) > Phallostethidae (Priapiumfishes)
Etymology: Neostethus: Greek,neos = new + Greek, stetho, stethion = brest; literal = to prick a little breast (Ref. 45335); djajaorum: Named in honor of the Rachmat Djaja and family, for their kindness and extraordinary support of the author's fieldwork in Sulawesi (Ref. 44355).
Eponymy: The Djaja family -Rachmat, Jootje and their three children (Ike, Yuni and Andi) – were honoured “...for their kindness and extraordinary support of [the authors’] fieldwork in Sulawesi.” Nothing more was recorded. (Ref. 128868), visit book page.

Environment: milieu / climate zone / depth range / distribution range Ecology

Brackish; pelagic. Tropical

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Western Central Pacific: Sulawesi, Indonesia.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 1.9 cm SL male/unsexed; (Ref. 44355)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 2; Dorsal soft rays (total): 6; Anal spines: 0; Anal soft rays: 15; Vertebrae: 33 - 35. Like N. robertsi and N. palawanensis, has a large second ctenactinium that is bifid distally, but distinguished from those species by having a bone larger and more distinctly claw-shaped, and extent of a bony projection and fleshy profile on the ventral margin of the first ctenactinium that abuts the claw (Ref. 44355).

Collected over a muddy bottom, in a slightly turbid irrigation ditch relatively near the sea (Ref. 44355). Fertilization is internal and eggs are attached to the substrate via adhesive filaments (Ref. 43413).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Pelvic fins in males modified to form part of a complex thoracic clasping organ (Ref. 205).

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Parenti, L.R., 1999. Phallostethidae. Priapium fishes. p. 2146-2148. In K.E. Carpenter and V.H. Niem (eds.) FAO species identification guide for fishery purposes. The living marine resources of the Western Central Pacific. Volume 4. Bony fishes part 2 (Mugilidae to Carangidae). FAO, Rome. (Ref. 12936)

IUCN Red List Status (Ref. 130435: Version 2024-1)

Data deficient (DD) ; Date assessed: 13 December 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5002 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.0 ±0.3 se; based on size and trophs of closest relatives

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Neostethus djajaorum Parenti & Louie, 1998