| Clupeidae (Herrings, shads, sardines, menhadens) |
| 10 cm SL (male/unsexed) |
|
pelagic; freshwater |
| South America: Uruguay and Argentina. |
|
Dorsal spines (total): 0-0; Dorsal soft rays (total): 15-16; Anal spines: 0-0; Anal soft rays: 12-23. Belly sharply keeled. No distinct silver stripe along the flank and the first (anterior) supra-maxilla minute or absent (cf. Platanichthys platana). Distinguished from very similar R. arcuata of coastal waters by having fewer dorsal and pectoral fin rays and fewer gill rakers total; from small Sardinella and Harengula by the evenly rounded hind margin of the gill opening. |
| Apparently confined to freshwater at mouths of rivers and their lower reaches. Presumably schooling. |
|
Least Concern (LC); Date assessed: 14 October 2019 Ref. (130435)
|
| harmless |
|
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