Common names: weakfish (English), corvina (Espanol)
Macrodon mordax (Gilbert & Starks, 1904)
Dog-tooth weakfish, Toothed weakfish
Body elongate, compressed; eye moderately large; mouth oblique, large, lower jaw projecting; chin with minute pores, no barbells; teeth large, pointed, with large canines at front, those on top jaw strongly curved, with arrow-head tips; gill rakers 9-11; preopercle edge smooth; dorsal rays IX-X+I, 27-30; anal fin I-II weak spines, 9-10, with short base; pectorals long, reaching beyond tips of depressed pelvic fins; edge of tail fin S shaped; scales small, smooth; soft dorsal and anal entirely scaled; pored lateral-line scales 45-55.
Silvery, bluish or greenish greyish on upper back; axil of pectoral fin dark; fins whitish to slightly dusky.
Size: grows to 50 cm.
Inhabits coastal waters, including bays and estuaries.
Depth: 5-30 m.
Costa Rica to Ecuador.