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Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Polynemidae (Threadfins)
Etymology: Polydactylus: Greek, poly = a lot of + greek, daktylos = finger (Ref. 45335); malagasyensis: Named for old name of Madagascar, Malagasy, its type locality (Ref. 40958).

Environment / Climate / Range Ecology

Marine; brackish; demersal; depth range 5 - 62 m (Ref. 40958). Tropical, preferred ?; 1°N - 35°S, 25°E - 51°E (Ref. 57343)

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Western Indian Ocean: Kenya, Mozambique, South Africa, and Madagascar. Likely to occur in Somalia and Tanzania.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 14.9 cm SL male/unsexed; (Ref. 40958)

Short description Morphology | Morphometrics

Dorsal spines (total): 9; Dorsal soft rays (total): 12-13; Anal spines: 3; Anal soft rays: 12; Vertebrae: 24. With 6 pectoral filaments; uppermost not reaching to (or extending slightly beyond) posterior tip of pectoral fin. Pectoral fin, rays long, 21-26% of SL; fin base long, 10-12% of SL; all rays branched except uppermost 1 or 2. Second dorsal spine long, 7-9% of SL. Well-developed swim bladder. A large black spot anteriorly on lateral line (Ref. 40958).

Found in estuaries as well as offshore (Ref. 57343).

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

Main reference Upload your references | References | Coordinator | Collaborators

Motomura, H., 2004. Threadfins of the world (Family Polynemidae). An annotated and illustrated catalogue of polynemid species known to date. FAO Spec. Cat. Fish. Purp. Rome: FAO. 3:117 p. (Ref. 57343)

IUCN Red List Status (Ref. 115185)

Not Evaluated

CITES (Ref. 94142)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: of no interest

FAO(Publication : search) | FisheriesWiki |

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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01820 (0.00790 - 0.04194), b=3.04 (2.84 - 3.24), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic Level (Ref. 69278): 3.5 ±0.5 se; Based on size and trophs of closest relatives

Resilience (Ref. 69278): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).

Vulnerability (Ref. 59153): Low vulnerability (12 of 100) .

Entered by Capuli, Estelita Emily

Modified by Garilao, Cristina V.

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Polydactylus malagasyensis Motomura & Iwatsuki, 2001