Ameca chub (Algansea amecae) is a ray-finned fish. It inhabits freshwater waters in pelagic environments. This species can reach a maximum total length of 10.1 cm. With a trophic level of 2.9, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Endangered on the IUCN Red List.
24-25 transverse scales (rarely 26); 14 upper row scales (occasionally 13 or 15); 14-19 pores in the infraorbital head sensory canal (usually 15-16). Body is divided dorsoventrally into 4 pigmentation zones as follows: a dark dorsal region; a light band equal to or greater than the width of the pupil; a prominent dark lateral stripe along body, considerably narrower at the anterior region just before the opercular opening; and a silver ventral region. Black spot at the base of caudal fi n set off from lateral stripe by a constriction of the pigment band, the spot extending out onto median caudal interradial membranes. Lateral line pigmented, edged by high concentrations of melanophores around scale pores .
Behavioural data for Ameca chub is currently being reviewed.
Freshwater; pelagic. Subtropical North America: Mexico.
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