dcsimg

Diagnostic Description

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Diagnosis: head and body strongly compressed; several rows of fine teeth in upper and lower jaw (Ref. 57403, 79590). Angle of mouth located below center or hind margin of eye (Ref. 57403). Interobital space 27-37% of eye diameter; 17-23 (perhaps up to 26) predorsal scales extending anteriorly to level of preoperculum or just behind eye; upper part of operculum scaled; about 57-69 scales in longitudinal series (54-66 on body and 3-5 scales on caudal fin base); 15-21 scales in rearward transverse series; 1st dorsal fin: VI; second dorsal fin: I,13 (rarely 12); anal fin: I,12-13 (perhaps 14); pectoral fins: 17-20; caudal fin lanceolate, its length about 40% of standard length, with 17 segmented rays, 15 of which are branched (Ref. 57403, 79590).Coloration: Preserved specimens: head and body generally pale or yellowish with indistinct pigmentation except for a dark triangular patch on operculum and a basicaudal spot; a faint large oval spot below 1st dorsal fin beneath pectoral fin rays often visible; anterior margin of 1st dorsal fin spine with 2-4 black spots; flanks pale with several diffuse dark areas along midline (Ref. 57403, 79590).
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Tobias Musschoot
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Migration

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Amphidromous. Refers to fishes that regularly migrate between freshwater and the sea (in both directions), but not for the purpose of breeding, as in anadromous and catadromous species. Sub-division of diadromous. Migrations should be cyclical and predictable and cover more than 100 km.Characteristic elements in amphidromy are: reproduction in fresh water, passage to sea by newly hatched larvae, a period of feeding and growing at sea usually a few months long, return to fresh water of well-grown juveniles, a further period of feeding and growing in fresh water, followed by reproduction there (Ref. 82692).
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Pascualita Sa-a
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Morphology

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Dorsal spines (total): 7; Dorsal soft rays (total): 12 - 13; Analspines: 1; Analsoft rays: 12 - 14
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Tobias Musschoot
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Biology

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Occur inshore, over sand (Ref. 4343, 5299). Marine species also found in brackish waters (Ref. 57403, 79590), including lagoons (Ref. 57403, 79590) and estuaries (Ref. 4343, 5299, 57403, 79590) and in the lower course of streams (Ref. 4343, 5299). Adults may occupy subtidal burrows (Ref. 79590). Maximum reported total length 19.6 cm (Ref. 57403).
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Pascualita Sa-a
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Importance

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fisheries:
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Pascualita Sa-a
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