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Grasseichthys gabonensis  Géry, 1964

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Grasseichthys gabonensis
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drawing shows typical fish in this Family.

Classification / Names Noms communs | Synonymes | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinoptérygiens (poissons à nageoires rayonnées) > Gonorynchiformes (Milkfish) > Kneriidae (Shellears)
Etymology: Grasseichthys: Greek, grassos, -ou = stink, dirt + Greek, ichthys = fish (Ref. 45335).   More on author: Géry.

Environnement / Climat / Gamme Écologie

; eau douce benthopélagique.   Tropical, preferred ?

Distribution Pays | Zones FAO | Écosystèmes | Occurrences | Point map | Introductions | Faunafri

Africa: scattered localities in the Ivindo and the larger Ogowe basin of Gabon; reports from the central Congo basin refer to another species (Ref. 81636).

Taille / Poids / Âge

Maturity: Lm ?  range ? - ? cm
Max length : 2.1 cm SL mâle / non sexé; (Ref. 42473)

Description synthétique Morphologie | Morphométrie

Épines dorsales (Total): 0; Rayons mous dorsaux (Total): 7-8; Épines anales 0; Rayons mous anaux: 9 - 10; Vertèbres: 35 - 36. Diagnosis: very small and larval in appearance; body elongate, laterally compressed, shallow (body depth 17.9-20.0% SL in females and 15.2-17.9% SL in males); scaleless; head small (head length 18.0-22.7% SL), with small, terminal mouth and large eyes; teeth absent; interorbital distance narrow (11.9-12.9% HL); gill opening short and located above pectoral fin; pectoral fins positioned ventrally and often splayed out from the body in preserved specimens; caudal peduncle long, with keels of transparent tissue, apparently anterior extensions of caudal fin membrane, reaching forward on both dorsal and ventral edge (ventral extension is more developed); caudal fin forked, with 16 rays, including an unbranched ray on dorsal and ventral edge; fin spines lacking; 2 branchiostegal rays; body semi-translucent, with myomeres clearly visible; lateral line absent; epibranchial organ reduced or absent (Ref. 81636).

Biologie     Glossaire (ex. epibenthic)

Open water species, not burrying in sand; forms schools; spawns during the raining season, during which it may be very abundant, forming aggregations in open water areas in the swamps; females of 20-24mm carry about 40 round, ripe eggs of about 0.4mm diameter; males mature at a size of about 18mm total length (Ref. 91379).

Life cycle and mating behavior Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

Référence principale Upload your references | Références | Coordinateur | Collaborateurs

Géry, J., 1965. Poissons du bassin de l'Ivindo. I - Les biotopes. Biol. Gabon. 1(4):375-384. (Ref. 91379)

Statut dans la liste rouge de l'IUCN (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

Menace pour l'homme

  Harmless




Utilisations par l'homme

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