Rhencus macracanthus (Günther, 1864)
Longspine grunt
Longspine grunt,  Roncacho gordo,  Ronco bacoco,  Burro,  Ronco
Rhencus macracanthus
photo by Robertson, R.

Family:  Haemulidae (Grunts), subfamily: Haemulinae
Max. size:  37 cm TL (male/unsexed)
Environment:  benthopelagic; brackish; marine; depth range 1 - 30 m
Distribution:  Eastern Pacific: Mexico to Ecuador.
Diagnosis:  Body oblong, moderately compressed, and somewhat deep (depth contained 2.5 to 2.7 times in standard length); mouth small and terminal, its posterior end located at the same level as the anterior rim of the eye; first gill arch with 18 to 23 gill rakers; dorsal fin deeply notched, with 12 to 14 spines and 13 to 14 soft rays (XII-IV, 13-14); dorsal and anal fins with a scaly sheath, the soft portions with international scales; second anal spine much stronger and longer than third; back dark brown or gray; belly silvery; back and flanks with 4 or 5 indistinct, dark, transverse bars (sometimes absent); operculum sometimes with a small, dark spot (Ref. 55763).
Biology:  Found near the littoral zone of coastal waters (Ref. 9114). Penetrates estuaries (Ref. 9114). Marketed fresh (Ref. 9114). Depth range assumed (RF).
IUCN Red List Status: Least Concern (LC); Date assessed: 25 May 2007 Ref. (130435)
Threat to humans:  harmless
Country info:   
 


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